HELP IM BEGGING

Chrissy compared ice cream scoop prices at a local ice cream parlor.
2 scoops for $2.98
3 scoops for $3.69
4 scoops for $4.28
Which number of scoops have the best rate?
(A) Two scoops for $2.98 is the best rate
(B) Three scoops for $3.69 is the best rate
(C) four scoops for $4.28 is the best rate
(D) All of the prices per scoop have the same rate​

The Probability that a student will complete the exam  0.8186

The normal distribution is the continuous distribution where the probability tail of normal distribution does not touch at the x-axis, the graph of normal distribution data seems to be symmetric.

Let the random variable X is number of hours for complying the exam.

Assume the value of probability of complying the exam in one hour or less is:

P(X< 60) = [tex]P(\frac{X-\mu}{\sigma} < \frac{60-70}{5} )[/tex]

              = P(Z< -2)

              = 0.0227

The probability that a student will complete the exam in more than 60 minutes but less than 75 minutes is:

P(60 < X < 75) = [tex]P(\frac{60-70}{5} < \frac{X-\mu}{\sigma} < \frac{75-70}{5} )[/tex]

                        = P(-2 < Z < 1)

                        = 0.8413 - 0.0227

                        = 0.8186

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For the graph:  y= -2cos (x+π/2)

period: 2π

phase shift: 0

Vertical shift: - 2

Reflection about x axis.

For the graph:  y= 1/2sin 2(x-π/4)

period: π

phase shift: 0

Vertical shift:

No any reflection.

For the graph: y= -1/2sin (x+π/2)-1

period: 2π

phase shift: 0

Vertical shift: -1

Reflection about x axis.

(1) For the given function,

Since the period of y = -2cos(x) is 2π,

So the period of y = -2cos(x + pi/2) is also 2π

To find the phase shift.

The phase shift of y = -2cos(x) is π/2,

so the phase shift of y = -2cos(x + π/2) is 0.

The vertical shift is -2, and there is a reflection about the x-axis.

(2) For the given function,

y= 1/2sin 2(x-π/4)

Since the period of y = 1/2sin(x) is 2π,

so the period of y = 1/2sin(2x) is π.

The phase shift of y = 1/2sin(x) is π/4,

so the phase shift of y = 1/2sin(2x - π/4) is 0.

There is no vertical shift, and there is no reflection.

(3) For the given function,

y= -1/2sin (x+π/2)-1

Since the period of y = -1/2sin(x) is 2π,

so the period of y = -1/2sin(x + π/2) is also 2π.

The phase shift of y = -1/2sin(x) is -π/2,

so the phase shift of y = -1/2sin(x + π/2) is 0.

The vertical shift is -1, and there is a reflection about the x-axis.

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A symmetric distribution the proportion of students who scored within 3 standard deviations of the mean is approximately 68% or more.

The proportion of students who scored within 3 standard deviations of the mean, we need to use the empirical rule, also known as the 68-95-99.7 rule. However, since the distribution is stated to be not bell-shaped, we cannot strictly rely on this rule. Nonetheless, we can make an approximation assuming the distribution is roughly symmetric.

According to the empirical rule, for a bell-shaped distribution, approximately 68% of the data falls within one standard deviation of the mean, about 95% falls within two standard deviations, and roughly 99.7% falls within three standard deviations.

The average score is 76, and the standard deviation is 5. So, within three standard deviations of the mean, we have:

Lower limit = mean - 3 * standard deviation

Upper limit = mean + 3 * standard deviation

Lower limit = 76 - 3 * 5 = 76 - 15 = 61

Upper limit = 76 + 3 * 5 = 76 + 15 = 91

Therefore, we can approximate that the proportion of students who scored within 3 standard deviations of the mean is roughly the proportion of students who scored between 61 and 91.

Since the distribution is not specified further, we cannot determine the exact proportion. However, we can approximate it by assuming a symmetric distribution. Therefore, the proportion of students who scored within 3 standard deviations of the mean is approximately 68% or more.

To find the proportion of students who scored within 3 standard deviations of the mean, we need to use the empirical rule, also known as the 68-95-99.7 rule. However, since the distribution is stated to be not bell-shaped, we cannot strictly rely on this rule. Nonetheless, we can make an approximation assuming the distribution is roughly symmetric.

According to the empirical rule, for a bell-shaped distribution, approximately 68% of the data falls within one standard deviation of the mean, about 95% falls within two standard deviations, and roughly 99.7% falls within three standard deviations.

In this case, the average score is 76, and the standard deviation is 5. So, within three standard deviations of the mean, we have:

Lower limit = mean - 3 ×standard deviation

Upper limit = mean + 3 × standard deviation

Lower limit = 76 - 3 × 5 = 76 - 15 = 61

Upper limit = 76 + 3 × 5 = 76 + 15 = 91

Therefore, we can approximate that the proportion of students who scored within 3 standard deviations of the mean is roughly the proportion of students who scored between 61 and 91.

Since the distribution is not specified further, we cannot determine the exact proportion. However, we can approximate it by assuming a symmetric distribution. Therefore, the proportion of students who scored within 3 standard deviations of the mean is approximately 68% .

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The explicit formula for the th term of the given sequence is Tn = 1 + n^2. We arrived at this formula by analyzing the pattern in the given sequence, which involves adding consecutive odd numbers starting from 1 to the terms of the sequence after adding 1 to each term.

By expressing this pattern in terms of the value of n (the term number), we arrived at the formula Tn = 1 + n^2, which gives us the value of the nth term of the sequence directly.To find an explicit formula for the th term of the given sequence, we first need to observe the pattern in the sequence. The given sequence is formed by adding consecutive odd numbers starting from 1 to the terms of the sequence after adding 1 to each term.

For example, the second term of the sequence is 3, which is obtained by adding 1 to the first term (0) and then adding the first odd number (1) to it. The third term of the sequence is 8, which is obtained by adding 1 to the second term (3) and then adding the second odd number (3) to it. Similarly, the fourth term is obtained by adding 1 to the third term (8) and then adding the third odd number (5) to it, and so on.

So, the th term of the sequence can be expressed as:

(1 + (1+1)) + (1 + (3+1)) + (1 + (5+1)) + ... + (1 + ((2n-3)+1)) + (1 + ((2n-1)+1))

= 1 + (1+1+3+1+5+1+...+(2n-3)+1+(2n-1)+1)

= 1 + (1 + 3 + 5 + ... + (2n-1)) + n

= 1 + n^2

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The simplified expression in the problem that we have in the question is;

(p - 7)/(p + 10)

By merging like terms , using mathematical processes, and simplifying any complex or unnecessary components, one can simplify an expression and bring it to its simplest or most direct form. This is the task that we have in the problem before us here.

Looking at the expression in the question, we can simplify the quadratic involved to have that;

7p (p - 8) /(p - 8) (p + 10) * (p - 7)/7p

(p - 7)/(p + 10)

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The Experimental probability of rolling either a 4 or 5 is 0.25 or 25%. To interpret experimental probabilities with caution and to repeat

experiments under different conditions to confirm the results.

The experimental probability of rolling either a 4 or 5, we need to add up the number of times that a 4 or 5 was rolled and divide by the total number of rolls. From the given table, we can see that a 4 was rolled 3 times and a 5 was rolled 5 times. Therefore, the total number of times that either a 4 or 5 was rolled is:

3 (for 4) + 5 (for 5) = 8

The total number of rolls is:

9 (for 1) + 9 (for 2) + 3 (for 3) + 3 (for 4) + 5 (for 5) + 3 (for 6) = 32

Therefore, the experimental probability of rolling either a 4 or 5 is:

8/32 = 1/4 = 0.25

So the experimental probability of rolling either a 4 or 5 is 0.25 or 25%. This means that if the experiment were repeated many times under similar conditions, we would expect to get either a 4 or 5 approximately 25% of the time.

It is important to note that this probability is based on the results of a single experiment, and the true probability may differ if the experiment were repeated many times. Additionally, the results may be influenced by factors such as the quality of the die, the rolling surface, and the technique used to roll the die. Therefore, it is important to interpret experimental probabilities with caution and to repeat experiments under different conditions to confirm the results.

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Answer:

Step-by-step explanation:

ajns

The point P on the curve r(t) = ⟨t, t^2 − 4t, 3t + 4⟩ that lies closest to the point P0(1, 12, 4) is (2, 0, 10), and the distance between P and P0 is √65.

To find the point on the curve that lies closest to P0, we need to minimize the distance between the two points. This can be done using the formula for the distance between two points in three-dimensional space. We get a quadratic equation in t, which we can minimize using calculus. The closest point is then found by plugging in the value of t into r(t). The line passing through the points P(0, 0, 0) and Q(4, 5, 6) can be expressed as r(t) = ⟨4ti, 5tj, 6tk⟩. We can find the direction vector of the line by subtracting the coordinates of P from the coordinates of Q, which gives us the vector ⟨4, 5, 6⟩. We can then express this vector in terms of i, j, and k and scale it by t to get the vector equation for the line. The point P corresponds to t = 0, and Q corresponds to t = 1, so we get r(t) = ⟨4ti, 5tj, 6tk⟩.

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we obtain the integral ∫[0,√(8)] ∫[0,√(x)] (√(64x^2 + 1))/8 dx dy,

To find the area of the region cut from the plane 4x + y + 8z = 2 by the cylinder whose walls are x = y^2 and x = 8 - y^2, we need to first find the intersection of the plane and the cylinder.

We can solve for y in terms of x from the equations x = y^2 and x = 8 - y^2 to get y = ±√(x) and then substitute this into the equation for the plane to get 4x ± √(x) + 8z = 2. Solving for z in terms of x and y, we get z = (1/8)(1 - 4x ± √(x)).

To find the area of the surface, we need to integrate the magnitude of the cross product of the partial derivatives of z with respect to x and y over the region of intersection.

That is, we need to evaluate the integral ∫∫(√(1 + (∂z/∂x)^2 + (∂z/∂y)^2)) dA over the region, where dA is the area element. Since the region is symmetric about the xz-plane, we can integrate over the part where y is non-negative and then double the result.

Using the equation for z, we can calculate the partial derivatives ∂z/∂x and ∂z/∂y, and then substitute these into the integrand. After some algebraic manipulation and simplification,

we obtain the integral ∫[0,√(8)] ∫[0,√(x)] (√(64x^2 + 1))/8 dx dy, which can be evaluated numerically using standard integration techniques to get the area of the surface.

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w h a t. will update when you fix the grammar

The net change in social surplus resulting from the voting outcome cannot be determined without additional information. The park may be considered a public good, meaning that it generates positive externalities and benefits everyone in the community, regardless of whether they contributed to its construction. Therefore, the net change in social surplus will depend on the level of demand for the park, the degree of crowding, and other factors. If the park is heavily utilized and generates significant social benefits, the net change in social surplus resulting from its construction may be positive, even if some residents voted against it.

Social surplus is the difference between the total value that individuals place on a good or service and the total cost of producing it. When a public good is provided, the social surplus is often greater than the private surplus, since everyone in the community benefits from its provision. The net change in social surplus resulting from the voting outcome will depend on the degree of social benefits generated by the park and the level of utilization.

The net change in social surplus resulting from the voting outcome cannot be determined without additional information. The level of demand for the park and the degree of crowding will affect the degree of social benefits generated, which will determine the net change in social surplus. If the park generates significant social benefits and is heavily utilized, the net change in social surplus may be positive, even if some residents voted against its construction.

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The second derivative is negative at x = 0.408, we know that this critical point corresponds to a local maximum.

Calculus uses the second derivative test as a technique to identify a function's concavity and local extrema. It entails taking a function's second derivative and checking the sign at a crucial point. A local minimum or maximum is indicated by a positive second derivative and the opposite is true for a negative second derivative.

To find the critical points of the function[tex]f(x) = -64x^4 + 42x - 4[/tex], we need to find where the derivative of the function is equal to zero or undefined. Taking the derivative of f(x) gives us:

[tex]f'(x) = -256x^3 + 42[/tex]

Setting[tex]f'(x) = 0[/tex], we can solve for x:

[tex]-256x^3 + 42 = 0\\x^3 = 42/256\\x = (42/256)^(1/3) = 0.408[/tex]

So the only critical point of the function is x = 0.408.

To apply the second derivative test, we need to take the second derivative of f'(x):

[tex]f''(x) = -768x^2[/tex]

Plugging in our critical point x = 0.408, we get:

[tex]f''(0.408) = -768(0.408)^2 = -125.3[/tex]

Since the second derivative is negative at x = 0.408, we know that this critical point corresponds to a local maximum.

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The gradient of the function g(x, y) at the point (20, 0) is 9e. To find the gradient of a function at a given point, we need to take the partial derivatives of the function with respect to each variable and evaluate them at the point.

In this case, the partial derivative of g with respect to x is 9ey/x - 9xey/x^2, and the partial derivative of g with respect to y is 9xey/x. Evaluating these partial derivatives at the point (20, 0), we get:

∂g/∂x(20, 0) = 9e/20

∂g/∂y(20, 0) = 0

Therefore, the gradient of g at the point (20, 0) is the vector (9e/20, 0), which has a magnitude of 9e/20.

In summary, the gradient of the function g(x, y) at the point (20, 0) is 9e/20. The gradient is a vector that points in the direction of the steepest increase of the function at the given point. In this case, the gradient points in the direction of increasing x and has a magnitude of 9e/20, indicating that the function increases most rapidly in the x-direction near the point (20, 0). Knowing the gradient at a point can be useful for optimization problems, as it allows us to find the direction of the steepest ascent and move in that direction to find a maximum or minimum of the function.

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Determining whether an item belongs on the asset side of the Federal Reserve's balance sheet depends on the nature of the item. Assets that would be found on the Federal Reserve's balance sheet include cash, securities, loans, and property.

If it represents a valuable resource that the Federal Reserve owns, controls, or expects to receive economic benefits from in the future, it is likely to be classified as an asset. Examples of assets that would be found on the Federal Reserve's balance sheet include cash, securities, loans, and property.

The Federal Reserve's balance sheet is a financial statement that shows its assets, liabilities, and capital, and is used to monitor the financial health of the institution. The assets side of the balance sheet represents the resources that the Federal Reserve owns, controls, or expects to receive economic benefits from in the future. Examples of assets that would be found on the Federal Reserve's balance sheet include cash, securities, loans, and property.

Cash is a liquid asset that the Federal Reserve holds to meet the liquidity needs of the banking system. It includes both physical currency and electronic reserves held by banks at the Federal Reserve. Securities represent investments that the Federal Reserve holds in various forms, including Treasury securities, mortgage-backed securities, and agency debt. Loans are assets that the Federal Reserve makes to depository institutions, such as banks, in order to support their lending activities. Lastly, property represents the real estate and other physical assets that the Federal Reserve owns, such as buildings and equipment.

Overall, whether an item belongs on the asset side of the Federal Reserve's balance sheet depends on the nature of the item and whether it represents a valuable resource that the institution owns, controls, or expects to receive economic benefits from in the future.

Complete Question:

For each of the following, determine whether the item would be on the asset side of the feds balance sheet.

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Answer:

--------------------

Eliminate y and equate the right sides:

Find y by substitution of the value for x:

The distribution of X₁ - 3X₂ is a normal distribution with mean μ₁ - 3μ₂ and variance s₁² + 9s²₂ - 6rhos₁s₂.

To find the distribution of X₁ - 3X₂, we need to find the mean and variance of this new variable.

The mean of X₁ - 3X₂ is:

E(X₁- 3X₂) = E(X₁) - 3E(X₂) = μ₁ - 3μ₂

The variance of X₁ - 3X₂ is:

Var(X₁ - 3X₂) = Var(X₁) + 9Var(X₂) - 6Cov(X₁,X₂)

Since X₁ and X₂ have a bivariate normal distribution with means μ₁ and μ₂, variances s₁ and s₂ and correlation rho, we know that:

Var(X₁) = s²₁

Var(X₂) = s²₂

Cov(X₁,X₂) = rhos₁ s₂

Substituting these values into the variance equation, we get:

Var(X₁ - 3X₂) = s₁² + 9s²₂ - 6rhos₁s₂.

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For distances of 45 miles or less, Company A is cheaper, while for distances greater than 45 miles, Company B is the cheaper option.

To determine at what mileage Company A charges less than Company B, we can set up an equation and solve for the variable, which in this case will represent the number of miles driven. Let x be the number of miles driven, and let C(x) represent the cost of renting a car from Company B after driving x miles.

We know that Company A charges a flat fee of $82 for unlimited mileage, so we can represent the cost of renting from Company A as a constant function C(x) = 82. For Company B, the cost function is given by:

C(x) = 55 + 0.60x

We want to find the value of x for which Company A charges less than Company B. In other words, we want to find the point at which the two cost functions intersect. To do this, we can set the two functions equal to each other and solve for x:

82 = 55 + 0.60x

27 = 0.60x

x = 45

Therefore, when the number of miles driven is 45 or less, Company A charges less than Company B. For any mileage greater than 45, it is cheaper to rent from Company B.

In summary, Company A charges a flat rate of $82 for unlimited mileage, while Company B charges an initial fee of $55 and an additional $0.60 for every mile driven. To find the point at which Company A charges less than Company B, we set the two cost functions equal to each other and solve for the number of miles driven. The result is 45 miles, meaning that for any distance of 45 miles or less, it is cheaper to rent from Company A, while for any distance greater than 45 miles, Company B is the cheaper option.

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Answer:

1 hour and 19 min 1:19

Step-by-step explanation:

Answer:

Jacob was reading for 79 minutes, which is an 1 hour and 19 minutes :)

Step-by-step explanation:

Hope this helped! Have a great day!

Answer:

145°

Step-by-step explanation:

because opposite angles r equal

The probability of first a white bread without replacement and then selecting a blue bead is equal to 1/7

The probability of an event without replacement implies that once an item is drawn, then we do not replace it back to the sample space before drawing another item.

total number of beads = 15

probability of selecting a white = 6/15

probability of selecting a blue bead without replacing the first white = 5/14

probability of selecting a white without replacement and then a blue = 6/15 × 5/14

probability of selecting a white without replacement and then a blue = 1/7

Therefore, the probability of first a white bread without replacement and then selecting a blue bead is equal to 1/7

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The area under the graph of the function f(x) = e^x over the interval [-2, 2] is approximately 13.77 square units.

To calculate the area under the graph of the function, we can use integration. In this case, we need to integrate the function f(x) = e^x with respect to x over the interval [-2, 2].

The definite integral represents the area under the curve between the given limits.

∫[a,b] e^x dx

Applying the integral, we have: ∫[-2,2] e^x dx

Using the rules of integration, we can evaluate this integral to find the area under the curve.

The antiderivative of e^x is e^x itself. Evaluating the integral at the upper and lower limits, we get: [e^x] from -2 to 2

Plugging in the values, we have: e^2 - e^(-2)

This is the exact answer in terms of e. To get the numerical approximation, you can substitute the value of e into the expression to get the approximate area.

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The probability that the fair coin was selected given that the sequence HHTH was observed is 81/145.

Let F denote the event that the fair coin is chosen and let B denote the event that the biased coin is chosen. We want to find the probability of F given that the four flips of the chosen coin resulted in the sequence HHTH:

P(F|HHTH) = [[tex]\frac{P(HHTH|F) P(F)}{P(HHTH|F) P(F) + P(HHTH|B) P(B)}[/tex]]

We know that P(F) = 1/2 and P(B) = 1/2 since Beatrice selected one of the coins at random.

Next, we need to calculate the probabilities of the outcomes HHTH for each of the two coins:

P(HHTH|F) = (1/2)⁴ = 1/16

P(HHTH|B) = (2/3)² (1/3)² = 4/81

Substituting these values, we get:

P(F|HHTH) = (1/16) (1/2) / [(1/16)(1/2) + (4/81)(1/2)]

= (1/16) (1/2) / (1/2) [(1/16) + (4/81)]

= (1/16) / [1/16 + 4/81]

= 81/145

Therefore, the probability that the fair coin was selected given that the sequence HHTH was observed is 81/145.

The correct answer is not one of the given options.

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The measure of ∠s is 22 degrees according to corresponding and straight line angle.

We will use the rrelation between angles to find the measure of each. We see that ∠158 degree and angle r are corresponding angles and hence they will be equal. Thus, it can be said that angle r = 158 degree.

Now, angle r and angle s is present on same line. It means the sum of these two angles will be 180 degree. Using the relation to find angle s.

158 + angle s = 180

Angle s = 180 - 158

Subtract the values

Angle s = 22 degrees

Hence, ∠s measures 22 degrees.

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The kurtosis of an F-distribution with parameters r1 and r2 is given by: Kurtosis = [ 8(r2 + 2r1 - 1) ] / [ r2 (r1 - 2) (r1 - 4) ]

Assuming that r2 > 8, we can use the approximation given in the previous exercise to simplify this expression: Kurtosis ≈ 3 + [ 12 (r2 - 8) ] / [ (r2 - 6) (r2 - 4) ]

Therefore, the kurtosis of an F-distribution with parameters r1 and r2, assuming that r2 > 8, is approximately equal to 3 plus the expression above.

Kurtosis is a measure of the "peakedness" or "flatness" of a distribution compared to the normal distribution. It measures the degree to which a distribution has more or less weight in the tails compared to the normal distribution.

A distribution with kurtosis greater than 3 is said to be "leptokurtic," meaning it has heavier tails than the normal distribution. A distribution with kurtosis less than 3 is said to be "platykurtic," meaning it has lighter tails than the normal distribution. A distribution with kurtosis equal to 3 is said to be "mesokurtic," meaning it has tails that are similar in weight to the normal distribution.

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The estimate for the value of the integral is approximately 0.129.

The value of the integral ∫ 0^1 e^(-5x^4) dx needs to be evaluated using the Maclaurin series for e^x.

To do this, we can express e^(-5x^4) as a Maclaurin series:

e^(-5x^4) = 1 - 5x^4 + 25x^8/2! - 125x^12/3! + ...

Integrating this series term by term gives:

∫ 0^1 e^(-5x^4) dx = x - (5/4)x^5 + (25/48)x^9 - (125/1920)x^13 + ...

We can estimate the value of this infinite series by using only the first two terms:

∫ 0^1 e^(-5x^4) dx ≈ 0.13 - (5/4)(0.13)^5 = 0.129

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The distance between the points u= 0 −6 3 and z= −2 −1 8 is approximately 9.95 units.

To calculate the distance between two points in three-dimensional space, we can use the distance formula, which is derived from the Pythagorean theorem. The distance formula states that the distance between two points (x1, y1, z1) and (x2, y2, z2) is equal to the square root of [(x2 - x1)^2 + (y2 - y1)^2 + (z2 - z1)^2].

Using this formula, we can find the distance between u and z as follows:

d = sqrt[(-2 - 0)^2 + (-1 - (-6))^2 + (8 - 3)^2]

= sqrt[4 + 25 + 25]

= sqrt(54)

≈ 9.95

Therefore, the distance between the points u and z is approximately 9.95 units.

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The game's outcomes can vary quite a bit from the expected value, and you could win more or less than $1.50 in any game.

The expected value is calculated as the sum of the product of each possible outcome and its . In this game, the possible outcomes are $3 and $0, and the probability of each outcome is 1/2 (assuming a fair coin). Therefore, the expected value of the game is:

Expected value = ($3 x 1/2) + ($0 x 1/2) = $1.50

This means that if you played the game many times, you could expect to win an average of $1.50 per game.

The variance of the game is a measure of how much the outcomes vary from the expected value. It is calculated as the sum of the squared difference between each outcome and the expected value, weighted by their respective probabilities. In this game, the variance is:

Variance = [(($3 - $1.50)^2 x 1/2) + (($0 - $1.50)^2 x 1/2)] = $2.25

This means that the outcomes of the game can vary quite a bit from the expected value, and you could win more or less than $1.50 in any given game.

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False. The ANOVA F-statistic is defined as the Between Group Variation divided by the Within Group Variation.

In Analysis of Variance (ANOVA), we compare the variation between different groups (the Between Group Variation) to the variation within each group (the Within Group Variation). The F-statistic is the ratio of the Between Group Variation to the Within Group Variation.

The F-statistic is used to test the null hypothesis that the means of the different groups are equal. If the F-statistic is large and the associated p-value is small, we reject the null hypothesis and conclude that there is evidence of a difference between the means of the groups.

On the other hand, if the F-statistic is small and the associated p-value is large, we fail to reject the null hypothesis and conclude that there is not enough evidence to conclude that the means of the groups are different.

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the number is really "x", which oddly enough is the 100%, but we also know that 15% of that is 9, so

[tex]\begin{array}{ccll} Amount&\%\\ \cline{1-2} x & 100\\ 9& 15 \end{array} \implies \cfrac{x}{9}~~=~~\cfrac{100}{15} \\\\\\ \cfrac{x}{9} ~~=~~ \cfrac{20}{3}\implies 3x=180\implies x=\cfrac{180}{3}\implies x=60[/tex]