PLEASE HELP ME ASAP :(

Answer:

D) The revised interval is wider than the original interval because the corect sample proportion is closer to 0.5 than the mis-calculated proportion is.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

The larger the closer to 0.5 the value of [tex]\pi[/tex], the larger the margin of error and the wider the interval is.

A biologist studying trees constructed the confidence interval (0.14, 0.20)

This means that the estimate used was of:

[tex]\pi = \frac{0.14 + 0.2}{2} = \frac{0.34}{2} = 0.17[/tex]

The correct sample proportion was 0.27.

With [tex]\pi = 0.27[/tex], the margin of error is larger as 0.27 is closer to 0.5 than 0.17. Thus, the revised interval will be wider, and the correct answer is given by option D.

Answer:

You can use x as the variable.  x≤1

Step-by-step explanation:

Answer:

-40g^{9}h^{8}

Step-by-step explanation:

Answer:

The roots are [tex]x = (\frac{3}{2}, -2)[/tex], which is given by option C.

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

[tex]ax^{2} + bx + c, a\neq0[/tex].

This polynomial has roots [tex]x_{1}, x_{2}[/tex] such that [tex]ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})[/tex], given by the following formulas:

[tex]x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}[/tex]

[tex]x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}[/tex]

[tex]\Delta = b^{2} - 4ac[/tex]

In this question, we have that:

[tex]2x^2 + x - 6 = 0[/tex]

Which is a quadratic equation with [tex]a = 2, b = 1, c = -6[/tex]. So

[tex]\Delta = 1^{2} - 4*2(-6) = 1 + 48 = 49[/tex]

[tex]x_{1} = \frac{-1 + \sqrt{49}}{2*2} = \frac{6}{4} = \frac{3}{2}[/tex]

[tex]x_{2} = \frac{-1 - \sqrt{49}}{2*2} = \frac{-8}{4} = -2[/tex]

So the roots are [tex]x = (\frac{3}{2}, -2)[/tex], which is given by option C.

Answer:

12 divided by 2 + 4 - 2 x 3 is 4

Step-by-step explanation:

I did 12 divided by 2 first which was 6 then added 4 subtracted it by 2 then multiplied it by 3 and got 4.

Answer:

daffodil = $13 Tulip = $7

Step-by-step explanation:

6t + 12d = 198

7t + 6d = 127

6t = 198 - 12d

t = 33 -2d

substitute

7(33-2d) + 6d = 127

231 -14d +6d = 127

- 8d = -104

d =13

6t + 12(13) = 198

6t +156 = 198

6t = 42

t = 7

Answers:

2/4 = 12/24

15/10=3/2

11/44=3/12

How we solved this: First, we need to find a denominator or numerator, when simplified, gives us the same value on the other side of the equation.

Hope this helps!

--Applepi101

Step-by-step explanation:

x = 2 and 8

hope this helps

9514 1404 393

Answer:

  169 square inches

Step-by-step explanation:

The surface consists of one square base and four triangles. So, the total surface area is ...

  base area + 4 × triangle area = 25 in² + 4×36 in² = 169 in²

Answer:

C) is the correct answer

Step-by-step explanation:

In order to find an average, you need to add x, y, and z and then divide them by 3 because there are 3 test scores, and x, y, and z represent the grades for each test. This is why C) x+y+z/3 is correct.

nice

i think there's supposed to be more to the problem lol

???

No question but I gonna answer anyway.

The total number of km she ran in 3 days = 13 x 3=39.

Answer: to move a graph up c units, add c to the whole function

so basicaly what you did is you subtraced 3 from the whole function

the whole graph shifts 3 units down

B is answer

Step-by-step explanation:

Answer:

Option A linear is your answer ☺️☺️

The best-fitting regression model for the scatterplot is,

⇒ Linear

The equation of line in point-slope form passing through the points

(x₁ , y₁) and (x₂, y₂) with slope m is defined as;

⇒ y - y₁ = m (x - x₁)

Where, m = (y₂ - y₁) / (x₂ - x₁)

Given that;

Scatter plot is shown in image.

Now, We can see by the scatterplot,

The best-fitting regression model for the scatterplot is,

⇒ Linear

Thus, The best-fitting regression model for the scatterplot is,

⇒ Linear

Learn more about the equation of line visit:

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Answer:

180

Step-by-step explanation:

triangle: 1/2bh = 1/2 24x24 = 288

rectangle : 18x6 = 108

288-108 = 180in ^2

Answer:

54

Step-by-step explanation:

48 / 8 = 6

48 + 6 = 54

Answer:

They have 54 coins together.

Step-by-step explanation:

if you divide 48 by 8, then you get 6. you then add 6 to 48 and you get 54.

Answer:

b. As the sample size â increases, the variance of decreases. â So, the distribution of becomes highly concentrated around.

Step-by-step explanation:

Let : Yi,.... Yn are = i.i.d are random variables. The probability density of the distribution varies along with the sample size. When the sample size changes, the probability density of [tex]$E^3$[/tex] also changes.

The probability distribution may be defined as the statistical expression which defines the likelihood of any outcome for the discrete random variable and it can be opposed to the continuous random variable.

In the context, when the size of the sample of the distribution size increases, it causes a decrease in the variance and so the distribution becomes highly concentrated around.

Answer:

a. mean = 1000

standard deviation = 4358.9

b. expected value of average damage bar Y = 1000

probability bar y exceeds 2000 = 0.011

Step-by-step explanation:

we have p1 = 95%, y1 = 0, p2 = 5%, y2 = 20000

Mean = (0.95 * 0) + (0.05 * 20000)

= 1000

var(y) = E(y²) - E(Y)²

= we solve for E(y)²

= 0²*0.95 + 20000²*0.05

= 0 + 20000000

then the variance of y = 20000000 - 1000²

=20000000-1000000

= $19000000

standard  deviation is the square root of variance

= √19000000

= 4358.9

2.

a. Expected value of average is also the mean = 1000

b. we are to find probability that barY exceeds 2000

[tex]z=\frac{2000-1000}{\sqrt{19000000/100} }[/tex]

= 1000/435.889

= 2.29

1-p(z≤2.29)

= 1 - 0.989

= 0.011

so the probability that barY exceeds 2000 is 0.011

Answer:

(8,3)

Step-by-step explanation:

Hello There!

This is the rule for reflection over y axis:

(x,y) -----> (-x,y)

So if the point (-8,3) we're to reflect over the y axis then the x value would stay the same but the sign would flip

So instead of -8 it would be +8

The y value does not change so the new coordinates would be

(8,3)

Answer:

12897 square feet

Step-by-step explanation:

So first find the area of the square:

85 * 85 = 7225

Then, the two semi circles together is a full circle. Use the circle area formula,

A = πr^2

The radius (r) would be half the diameter of the circle. The diameter of the circle would be 85. So half of that is 42.5. The radius is 42.5

Now:

A = π(42.5)^2

A = 3.14(42.5)^2

A = 3.14(1806.25)

A = 5671.625

Lastly, add the two areas up for the square and circle:

7225 + 5671.625 = 12896.625

Round to nearest tenth: 12897

Answer:

Step-by-step explanation:

Answer:

89.8ft

Step-by-step explanation:

678-672=6, the value for line ZW

Using Pythagoras theorem, then t²+6²=90²

t²=90²-6²

t²=8100-36

√t²=√8064

t=89.8ft

Answer:

Do the ratios 9/10 and 2/4 form a proportion?anation:

Step-by-step expl

Answer:

no bestie

Step-by-step explanation:

Answer:

10,454,400 sec

Step-by-step explanation:

1Day=24hr

1hr=60min

1min=60sec

121 days=121*24*60*60=10,454,400sec

Answer:  

Let's complete the fishbone diagram given below

thats  what they said

Step-by-step explanation:

Answer:

Population in 2050 = 11,369,600,000

Step-by-step explanation:

Given:

Population in 2000 = 6,080,000,000

Rate of increase = 1.26%

Find:

Population in 2050

Computation:

Number of year = 50

Population in 2050 = Population in 2000[1+r]ⁿ

Population in 2050 = 6,080,000,000[1+1.26%]⁵⁰

Population in 2050 = 6,080,000,000[1.87]

Population in 2050 = 11,369,600,000

Answer:

[tex]P(Not\ Blue) = \frac{2}{3}[/tex]

Step-by-step explanation:

Given

[tex]Red = 6[/tex]

[tex]Blue =5[/tex]

[tex]Green = 4[/tex]

Required

The probability of not selecting blue.

This means that any of the other colors is selected.

So, we have:

[tex]P(Not\ Blue) = P(Red) + P(Green)[/tex]

[tex]P(Not\ Blue) = \frac{Red}{Total} + \frac{Green}{Total}[/tex]

[tex]P(Not\ Blue) = \frac{6}{15} + \frac{4}{15}[/tex]

Take LCM

[tex]P(Not\ Blue) = \frac{6+4}{15}[/tex]

[tex]P(Not\ Blue) = \frac{10}{15}[/tex]

Divide by 5/5

[tex]P(Not\ Blue) = \frac{2}{3}[/tex]

Answer:

B. AA

Step-by-step explanation:

The diagram given shows that two angles in ∆ABC are congruent to two corresponding angles in ∆STU.

Invariably, the third unknown angle of both triangles would also be equal going by the third angle theorem.

Thus, based on the AA Similarity Theorem which says that two triangles are similar to each other if two corresponding angles of one is congruent to two angles in the other, ∆ABC ~ ∆STU.

Answer:

a. 0.3

Step-by-step explanation:

The probability that a randomly selected car with no 4-wheel drive has third-row seats is 0.3 option (A) 0.3 is correct.

It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.

The question is incomplete.

The complete question is in the picture, please refer to the attached picture.

Let's suppose A is the car with no 4-wheel drive

Let's suppose B is the car with third-row seats

As we know,

P(B|A) = n(A ∩ B)/n((A)

The probability that a randomly selected car with no 4-wheel drive has third-row seats:

From the table:

n(A ∩ B) = 12

n((A) = 40

P(B | A) = 12/40

P(B | A) = 0.3

Thus, the probability that a randomly selected car with no 4-wheel drive has third-row seats is 0.3 option (A) 0.3 is correct.

Learn more about the probability here:

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