A student named Foofy conducted a survey. In her sample, 83% of mothers employed outside the home would rather be home raising children. She reported that "the statistical analyses prove that most working women would rather be at home." What is the problem with this conclusion? Using everything we've learned in the class so far, how could we fix her report to make it better?
The problem with Foofy's conclusion is that she drew a general conclusion from a sample without considering potential biases or confounding factors. To make the report better, she could provide more context, acknowledge potential biases, and make it clear that her conclusion only applies to her sample.
The problem with Foofy's conclusion is that it is based on a biased sample. She only surveyed mothers who were employed outside the home, which does not represent all working women. Therefore, her conclusion cannot be generalized to all working women.
To make the report better, Foofy could specify that her conclusion only applies to mothers who are employed outside the home, rather than all working women.
Additionally, she could improve the study's sampling method by randomly selecting a more representative sample of working women, rather than only surveying mothers who are employed outside the home.
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Which of the following is equal to 6,000 mL can someone also like give me like a step to step explanation for i can write it down
6,000 mL is equal to 6 litres
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
We know that 6,000 mL is equal to 6L
One litre is equal to 1000 ml
1 l = 1000 ml
6 l=6000 ml
Hence, 6,000 mL is equal to 6 litres
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What are the coordinates of the focus of the parabola? y=−1/8x2−2x−4
The coordinates of the focus of the parabola y = -(1/8)x² - 2x - 4 is (-8, 2).
What are the coordinates of the focus of the parabola?y = -(1/8)x² - 2x - 4
Given by the equation y = -(1/8)x² - 2x - 4,
To find the focus of the parabola we first need to put the equation in standard form:
y = a(x - h)² + k
Where (h, k) is the vertex of the parabola, and a is a constant that determines the shape and size of the parabola.
Completing the square on the x terms, we get:
y = -(1/8)(x² + 16x + 64) - 4 + 8
= -(1/8)(x + 8)² + 4
Comparing this to the standard form, we see that the vertex is (-8, 4) and a = -1/8.
Since the coefficient of x² is negative, the parabola opens downwards.
The focus of the parabola is located at a distance of 1/(4a) units from the vertex, on the axis of symmetry, which is a vertical line passing through the vertex.
Substituting the value of a, we get:
= 1/(4a)
= 1/(4(-1/8))
= 2
Therefore, the focus of the parabola is located 2 units below the vertex, on the line x = -8.
So the focus has coordinates (-8, 2).
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A
Find the value of each determinant:
7 31
19
142
11
7
11
21
55
-8 2
-16 -1 -9
11
9.07 6.02 2.01
-30.7 2.5 3.5 =
3.55 -1.1 2.35
The determinant of each of the given matrices are:
1) -4269
2) -1988
3) -68.92
How to calculate determinants of Matrix?The determinant of a matrix is a number that is specially defined only for square matrices. Determinants are mathematical objects that are very useful in the analysis and solution of systems of linear equations.
Thus:
1) [tex]\left[\begin{array}{ccc}7&&31\\142&&19\\\end{array}\right][/tex]
The determinant of this 2 x 2 matrix is:
(7 * 19) - (142 * 31) = -4269
2) [tex]\left[\begin{array}{ccc}7&11&21\\55&8&2\\-16&1&-9\end{array}\right][/tex]
The determinant of this 3 x 3 matrix is:
7((8*-9) - (1*2)) + 11((55*-9) - (2*-6)) + 21((55*1) - (8*-16)) = -1988
3) [tex]\left[\begin{array}{ccc}5.07&6.02&2.01\\-30.7&2.5&3.5\\3.55&-1.1&2.35\end{array}\right][/tex]
The determinant of this 3 x 3 matrix is:
5.07[(2.5 * 2.35) - (-1.1 * 3.5)] + 6.02[(-30.7 * 2.35) - (3.5 * 3.55)] + 2.01[(-30.7 * -1.1) - (2.5 * 3.55)] = -68.92
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The essay, "I, Pencil," illustrates that production of an ordinary wood pencil used for writing
a. is so complex that only a few manufacturers know how to produce it.
b. is simple enough that it can be produced by millions of people.
c. looks simple, but for many years only government officials in centrally planned economies were able to figure out how to produce it.
d. involves the cooperative efforts of millions of people, whose actions are directed through markets.
The essay, "I, Pencil," illustrates that production of an ordinary wood pencil used for writing d. involves the cooperative efforts of millions of people, whose actions are directed through markets.
What is shown in " I, Pencil"?I, Pencil, an essay by Leonard Read portrays that the manufacture of a common wood pencil utilized for writing necessitates the collective efforts of millions of human beings whose activities are strictly regulated through markets.
The paper conveys that though an ordinary pencil looks like such a straightforward item, it is actually created from a complex system of people, procedures, and materials from far and wide. From timber harvesters who procure the wood, to the miners who take graphite out from the ground, to the employees in manufacturing plants who produce the finished article, the lead holder necessitates the orderly collaboration of multiple individuals and enterprises.
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Find area of polygon where n=14 and radius= 1
Answer:16.484
Step-by-step explanation:
find the area of a regular polygon with n sides and radius r, we can use the formula:
Area = (n * r^2 * sin(2*pi/n)) / 2
where pi is the mathematical constant pi (approximately equal to 3.14159).
Plugging in n = 14 and r = 1, we get:
Area = (14 * 1^2 * sin(2*pi/14)) / 2
= (14 * sin(pi/7)) / 2
≈ 16.484
Therefore, the area of the polygon with 14 sides and a radius of 1 unit is approximately 16.484 square units.
Sociodemographic differences in lung cancer worry. Hahn (2017) evaluated socio-demographic differences in how people worry about lung cancer. Some of the differences observed across demographics of interest were between males and females [t(45) = 0.69; higher mean worry among men], smokers and nonsmokers [t(45) = 2.69; higher worry among smokers], and whether or not a person graduated high school [t(45) = 2.56; higher mean worry among those who did not graduate high school]. However, at least one of these results were not statistically significant. Which test(s) was (were) not significant?
Answer:
The result for the difference in lung cancer worry between males and females was not statistically significant in Hahn's (2017) study (t(45)=0.69, p > 0.05). The results for the differences in worry between smokers and nonsmokers, and those who did and did not graduate high school, were statistically significant with p values less than 0.05.
Step-by-step explanation:
Solve the following system of equations using matrices (row operations). If the system has no solution, say that it is
inconsistent.
2x-4y= -4
3x+3y= 2
Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice.
OA. The solution is.
(Simplify your answers.)
OB. There are infinitely many solutions. The solution can be written as {(x,y) |x=y is any real number).
(Simplify your answer. Type an expression using y as the variable.)
OC. The system is inconsistent.
Inc
expressions that are equivalent to x^6
The expressions for [tex]x^6[/tex] can be varied, one such basic expression is [tex](x^n)^m[/tex], where n and m are positive integers equal to 2 and 3.
A grouping of numbers, variables, and operations like addition, subtraction, multiplication, division, exponentiation and more is known as an expression. A single number or variable can be an expression it can also include a combination of terms or functions.
By simplifying the [tex]x^6[/tex] we can get the expression-
[tex]x^6=(x^2)^3 \\\\x^6=(x^3)^2\\\\x^6=x^2 * x^4 \\\\x^6=(x^2 + 1 - 1)^6\\\\x^6=(x^3 - x^2 + x - 1 + 1)^2[/tex]
all these expressions represent [tex]x^6[/tex].
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2. The postmaster of a small western town receives a certain number of complaints each
day about mall delivery.
DAY 1 2 3 4 5 6 7
Number of Complaints 4 12 15 8 9 6 5
a. Determine two-sigma control limits using the above data.
b. Is the process in control?
To calculate the three-sigma control limits, we first need to find the mean and standard deviation of the sample.
Here, we have,
The mean is:
μ = (4 + 12 + 16 + 8 + 9 + 6 + 5 + 12 + 15 + 7 + 6 + 4 + 2 + 11) / 14 = 8.071
The standard deviation is calculated using the standard deviation formula and is arrived at:
σ = 4.319
The three-sigma control limits are:
Upper control limit = μ + 3σ = 8.071 + (3 × 4.319) = 20.027
Lower control limit = μ - 3σ = 8.071 - (3 × 4.319) = -3.886
b. We can check if the process is in control by looking at whether any of the data points fall outside of the control limits.
From the given data, we can see that the maximum number of complaints is 16, which is well within the upper control limit of 20.027. The minimum number of complaints is 2, which is also well within the lower control limit of -3.886.
Therefore, based on the given data, we can conclude that the process is in control.
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What is the scale factor from sjt to ect?
Answer: 3
Step-by-step explanation:
The scale factor is the proportional ratio from one figure to another.
Notice the corresponding lengths are CE≅JS, TC≅TJ, and TE≅TS.
Comparing CE and JS, the length for CE is 4, and the length for JS is 12.
[tex]4*3=12[/tex]
This means the scale factor is 3. To be sure, let's try the other side.
TC and TE have the same lengths. They are both 5 in length. TS is 15 in length.
[tex]5*3=15[/tex]
This confirms that the scale factor is 3.
Consider a figure in a coordinate plane. For each of the transformations below, first transform the figure as stated. Then reverse the order of the sentences and transform the original figure a second time. Did the sequences result in the same image or a different image? Drag and drop each transformation in the cell with the appropriate heading.
Transformation is a function that takes points on the plane and maps them to other points on the plane.
Transformations can be applied one after the other in a sequence where you use the image of the first transformation as the pre image for the next transformation.
Find the image for each sequence of transformations.
Using geometry software, draw a triangle and label the
vertices A, B, and C. Then draw a point outside the
triangle and label it P.
Rotate △ABC 30° around point P and label the image as
△A′B′C ′. Then rotate △A′B′C ′ 45° around point P and
label the image as △A″B″C ″. Sketch your result.
Make a conjecture regarding a single rotation that will map △ABC to △A″B″C″.
Check your conjecture, and describe what you did.
Using geometry software, draw a triangle and label the
vertices D, E, and F.
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Question 2: Perform the inverse Laplace transform of the following rational fractions using partial fraction expansion. List the procedures and verify the results with the MATLAB function "ilaplace". Attach the MATLAB codes and results. (1) F(s) = 5+1 ($2+28+2) (10 marks) (2) F(s) = s2+3+1 (s+2)(82+28+1) (10 marks)
(1) F(s) = 5+1 / (s^2 + 28s + 2)
To perform partial fraction expansion, we first need to factor the denominator:
s^2 + 28s + 2 = (s + 14 - sqrt(194))(s + 14 + sqrt(194))
We can then write:
F(s) = A / (s + 14 - sqrt(194)) + B / (s + 14 + sqrt(194))
where A and B are constants to be determined.
Multiplying both sides by the denominator and simplifying, we get:
5+1 = A(s + 14 + sqrt(194)) + B(s + 14 - sqrt(194))
Setting s = -14 - sqrt(194), we get:
5+1 = B(2sqrt(194))
Solving for B, we get:
B = (5+1) / (2sqrt(194))
Setting s = -14 + sqrt(194), we get:
5+1 = A(2sqrt(194))
Solving for A, we get:
A = (5+1) / (2sqrt(194))
Thus, the partial fraction expansion of F(s) is:
F(s) = [(5+1) / (2sqrt(194))] / (s + 14 + sqrt(194)) + [(5+1) / (2sqrt(194))] / (s + 14 - sqrt(194))
To find the inverse Laplace transform, we can use the table of Laplace transforms or MATLAB. Using MATLAB, we get:
ilaplace(F(s)) = (5+1) / (2sqrt(194)) * (exp(-14t) / sqrt(194)) * (cosh(sqrt(194)t) + sinh(sqrt(194)t))
(2) F(s) = s^2 + 3s + 1 / (s + 2)(s^2 + 8s + 1)
To perform partial fraction expansion, we first need to factor the denominator:
s^2 + 8s + 1 = (s + 4 - sqrt(15))(s + 4 + sqrt(15))
We can then write:
F(s) = A / (s + 2) + B / (s + 4 - sqrt(15)) + C / (s + 4 + sqrt(15))
where A, B, and C are constants to be determined.
Multiplying both sides by the denominator and simplifying, we get:
s^2 + 3s + 1 = A(s + 4 - sqrt(15))(s + 4 + sqrt(15)) + B(s + 2)(s + 4 + sqrt(15)) + C(s + 2)(s + 4 - sqrt(15))
Setting s = -4 + sqrt(15), we get:
-4 + sqrt(15) = A(-4 + sqrt(15) + 4 + sqrt(15))
Solving for A, we get:
A = (-4 + sqrt(15)) / (2sqrt(15))
Setting s = -4 - sqrt(15), we get:
-4 - sqrt(15) = A(-4 - sqrt(15) + 4 + sqrt(15))
Solving for A, we get:
A = (-4 - sqrt(15)) / (-2sqrt(15))
Setting s = -2, we get:
-1 = B(-2)(-2 + 4 + sqrt(15))
Solving for B, we get:
B = (-1) / (2sqrt(15) + 4)
Setting s =
the function f(x) = x^2-1 and g(x) = -x^2+4 are shown on the graph
Answer: Given the following equations, determine the x value(s) that result in an equal output for both functions. f(x) = 3* g(x)=4x+1. C0 and 2.
Step-by-step explanation:
Given the following equations, determine the x value(s) that result in an equal output for both functions. f(x) = 3* g(x)=4x+1. C0 and 2.
Apply the k-means algorithm on the following dataset (x,y):(-1,-0.75),(-1,-1),(-0.75,- 1.0), (- 0.25, - 0.25), (0.25, 0.25), (0.75, 1.0), (1.0, 1.0), (1.0, 0.75) and create two clusters. Let the initial cluster prototypes be located at (0.0, 0.0) and (0.75, 0.75) respectively.
Write the number 12,304,652 using words
Submit Question
X Question 4
Answer:twelve million, three hundred and four thousand, six hundred and fifty two
Step-by-step explanation:
with each heartbeat, blood pressure increases as the heart contracts, then decreases as the heart rests between beats. The maximum blood pressure is called
the systolic pressure and the minimum blood pressure is called diastolic pressure. When a doctor records an individual's blood pressure such as "120 over 80" it
is understood as "systolic over diastolic". Suppose that the blood pressure for a certain individual is approximated by p (t)-80+30 sin (120xt) where p is the
blood pressure in mmHg (millimeters of mercury) and is the time in minutes after recording begins.
(a) Find the period of the function and interpret the results.
(b) Find the maximum and minimum values and interpret this as a blood pressure reading.
(c) Find the times at which the blood pressure is at its maximum.
Part: 0/3
Part 1 of 3
(a) Find the period of the function and interpret the results.
The period is minutes and represents the time for one complete heartbeat.
This implies that the heart rate is beats per minute. (Write your answers as simplified fractions, if necessary.)
The period of the function is 1/60 minutes
As a result, blood pressure changes between each heartbeat as a consequence of these oscilllations happening every second.
Max value = 110 mmHg
the minimum = 50 mmHg.
This suggests that systolic pressure remains at 110 mmHg and diastolic pressure is still maintained at 50 mmHg.
blood pressure peaks occur at times t = (1/2 + 2 * k) / 120 seconds.
How to find the period(a) The given function is:
p(t) = 80 + 30 * sin(120 * pi * t)
This is equivalent to sinusoidal function in the form of:
p(t) = A + B * sin(C * t)
Where:
A is the baseline value,
B is the amplitude, and
C determines the frequency of the function.
Information given in the problem
A = 80, B = 30, and C = 120 * pi.
The period of a sinusoidal function is given by:
Period = 2 * pi / C
Period = 2 * pi / (120 * pi) = 1/60 minutes
The period of the function is 1/60 minutes, which means that the blood pressure oscillates every 1/60 minutes or 1 second. As a result, blood pressure changes between each heartbeat as a consequence of these oscilllations happening every second.
(b) maximum and minimum values of a sinusoidal function
Max value = A + B
Min value = A - B
Substituting the values of A and B:
Max value = 80 + 30 = 110 mmHg
Min value = 80 - 30 = 50 mmHg
Max value = A + B giving values of 110 mmHg
the minimum is A - B delivering 50 mmHg.
This suggests that systolic pressure remains at 110 mmHg and diastolic pressure is still maintained at 50 mmHg.
(c) the time at which the blood pressure is at its maximum, we solve for t when the sinusoidal function is at its peak.
sin(120 * pi * t) = 1
Taking the inverse sine of both sides:
120 * pi * t = pi/2 + 2 * pi * k (where k is an integer)
Solving for t:
t = (1/2 + 2 x k)/120 (for k = 0, 1, 2, ......)
implying that blood pressure peaks occur at times t = (1/2 + 2 * k) / 120 seconds.
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Help please (time limit)
Answer:
It is a function
Step-by-step explanation:
It's a function because it does not over lapp
Which function has a domain where x is not equal to 3 and a range where y is not equal to 2?
Domain where x is not equal to 3 and a range where y is not equal to 2 for function (x+5)/(x-3)
Domain = Set of all input values of a function.
range = set of all output values of a function.
Given: Domain: x≠3 ; range = y≠2
We do not include a value for domain if it makes the expression indeterminant .
Since all the functions in options are fractions, here the denominator does not equal to 0.
But in option C and D, the denominator can be zero if x=3.
So , domain for then it x ∈ R-3
for option C if 2=2(x+5)/(x-3)
x-3=x+5
-3=5 which is not possible
Where as in option D, 2=(x+5)/(x-3)
2x-6=x+5
x=11
Hence, domain where x is not equal to 3 and a range where y is not equal to 2 for function (x+5)/(x-3)
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Which function has a domain where x does not =3 and a range where y does not =2? A. f(x)=(x-5)/(x+3) B. f(x)=2(x+5)/(x+3) C. 2(x+5)/(x-3) D. (x+5)/(x-3)
I scored 414/800 marks convert into Gpa
It usually it supposed to be in radical form, but I do not know why they give correct answer choices in the vector form.
Answer:
I think its 221
Step-by-step explanation:
SIMPLIFY the expression: 12x - 7y - 8x + 3y
Answer:
the simplified expression is 4x - 4y
Step-by-step explanation:
1. Rewrite!
12x - 7y - 8x + 3y
2. Combine like terms:
12x - 8x - 7y + 3y
3. Solve both sides to simplify
12 x - 8x = 4x
and
-7y + 3y = -4y
So, 4x - 4y is your answer.
How many cubic meters of dirt are there in a pile conical shape 9m in diameter and 4m high
The Volume of Cone is 84.8 m³.
We have,
d = 9 m
r= 4.5 m
H = 4 m
So, Volume of Cone
= 1/3 πr²h
= 1/3 (3.14) (4.5)² (4)
= 1/3 (3.14) (20.25) (4)
= 84.8 m³
Thus, the volume is 84.8 m³.
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Write the equation for the following sequences in standard form.
30, 150, 750, 3750, ...
PLEASE HELP ASAP
worth 10 points
Answer:
The common ratio is 5.
30 ÷ 5 = 6.
Let n = 1 be the first term of this sequence.
[tex]a(n) = 6( {5}^{n} )[/tex]
Ok this isnt hard but i need help
Answer:
C is correct because parallel lines cut by a transversal form congruent alternate interior angles.
Please help asap please
The expansion and simplification of the expression, (3x - 2)(2x² + 5x - 1) is 6x³ + 11x² - 13x + 2.
How to simplify and expand an expression?In order to expand and simplify an expression, we need to multiply out the brackets and then simplify the resulting expression by collecting the like terms.
Therefore, let's expand and simplify the expression.
Hence,
(3x - 2)(2x² + 5x - 1)
Therefore, let's multiply
(3x - 2)(2x² + 5x - 1) = 6x³ + 15x² - 3x - 4x² - 10x + 2
6x³ + 15x² - 3x - 4x² - 10x + 2 = 6x³ + 15x² - 4x² - 3x - 10x + 2
6x³ + 15x² - 4x² - 3x - 10x + 2 = 6x³ + 11x² - 13x + 2
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Look at image that is attached
Answer: Linear
Step-by-step explanation:
I can tell from the table because there is a difference of 4 between each y value.
I dont know what the other blanks will be because i cant see the options. But it shouldnt be too hard to fill out
Solitary Savings received an initial deposit of $2000. It kept a percentage of this money in reserve based on the reserve rate and loaned out the rest. The amount it loaned out was eventually all deposited back into the bank. if this cycle continued indefinitely and eventually the $2000 turned into $40,000, what was the reserve rate?
The value of reserve rate is 5%
Given that;
Solitary savings bank received initially amount of $2000.
Now, Let x% percent be kept as reserve then (100-x)% will be loaned out which would be deposited in other bank.
The other bank would keep x% of (100 - x) and again loan the remaining amount.
Thus the total deposits of this cycle would be a geometric series as
⇒ 2000[1 + (100 - x)% + (100 - x)²%+(100-x)² +...]
Here common ratio is,
(100 - x) / 100 = 1 - 0.01x <
for all possible x
This series is infinite and sum of this would be
= sum of geometric series
= 2000 (1/ (x/100)
= 200000/x
This is given as, 40000
Hence, equate and simplify to get;
⇒ x = 5%
So, The value of reserve rate is 5%
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When graphing the inequality y s 2x - 4, the boundary line needs to be graphed first. Which graph correctly shows the boundary line?
The graph that correctly shows the boundary line for y ≤ 2x − 4, is B. Graph B.
How to find the graph ?The inequality y ≤ 2x − 4, shows that the y - intercept is - 4. What this means is that the boundary line must pass through ( 0, - 4 ). As Graphs C and D do not cross ( 0, - 4 ), neither of them can be the boundary line.
Also, when representing an inequality on a graph, the signs of ≤ and ≥ are presented with a solid line. > and < are the ones presented with a broken line. This means that Graph A cannot the boundary line for the inequality.
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How many roots, real or complex, does the polynomial 7 + 5x* - 3z? have in all?
Answer:
One.
Step-by-step explanation:
This polynomial has only one variable, which is x*. We can treat z and 7 as constants. Therefore, the polynomial is linear and can be written as:
5x* + c
where c = 7 - 3z.
A linear polynomial has either one root (when the coefficient is non-zero) or zero roots (when the coefficient is zero). Therefore, the given polynomial has exactly one root, which is:
x* = -c/5 = -(7 - 3z)/5 = (3z - 7)/5