Suppose that a magazinemagazine predicted that Candidate A would defeat Candidate B in a certain election. They conducted a poll of telephone directoriestelephone directories with a response rate of 23​%. On the basis of the​ results, the magazinemagazine predicted that Candidate A would win with​ 57% of the popular vote.​ However, Candidate B won the election with about​ 62% of the popular vote. At the time of this​ poll, most households with telephoneshouseholds with telephones belonged to the party of Candidate A. Name two biases that led to this incorrect prediction.

Choose the correct answer below.

A.
Sampling bias Using an incorrect frame led to undercoverage.
Response bias: The way the poll was administered showed bias

B.
Sampling bias: Using an incorrect frame led to undercoverage
Nonresponse bias: The low response rate caused bias

C.
Nonresponse bias: The low response rate caused bias.
Response bias: The way the poll was administered showed bias.

Answer:

[tex] \boxed{B. \: 16 \: yards} [/tex]

Given:

Length of rectangle (l) = 28 yards

Perimeter of rectangle = 88 yards

Step-by-step explanation:

Let width of rectangle be 'w'

[tex] = > Perimeter \: of \: rectangle = 2(l + w) \\ \\ = > 88 = 2(28 + w) \\ \\ = > \frac{88}{2} = 28 + w \\ \\ = > 44 = 28 + w \\ \\ = > 28 + w = 44 \\ \\ = > w = 44 - 28 \\ \\ = > w = 16 \: yards[/tex]

Width of rectangle = 16 yards

In slope-intercept form, we have these values (y = mx + b):

m = slope

b = y-intercept

Change the equation from standard form to slope-intercept form.

-9x + 7y = 28

-9x + 9x + 7y = 28 + 9x

7y = 28 + 9x

7y/7 = 28/7 + 9x/7

y = 4 + 9/7x

y = 9/7x + 4

Therefore, the y-intercept is 4.

Best of Luck!

Answer:2t-7

i just kinda solved it hehe

The (2t - 7) is the expression that is equivalent to (2(t-4)+1) and this can be determined by using the arithmetic operations.

Given :

Expression - 2(t - 4) + 1

The following steps can be used to evaluate the given expression:

Step 1 - Open the parenthesis in the given expression. Then multiply 2 by t and then multiply 2 by -4.

= 2t - 8 + 1

Step 2 - Now, subtract 8 from 1 in the above expression.

= 2t - 7

So, the (2t - 7) is the expression that is equivalent to (2(t-4)+1).

For more information, refer to the link given below:

https://brainly.com/question/2353072

Answer:

Line B - red line

Step-by-step explanation:

Answer:

exact form: log(1024)

decimal form : 3.01029995

Step-by-step explanation:

Answer:

  -4, -2, 2, 8

Step-by-step explanation:

The first four terms will be found by evaluating the expression for values of n that are 1, 2, 3, 4. Evaluating for n=1 is sufficient to determine the correct answer choice:

  n(n -1) -4

  1(1 -1) -4 = -4 . . . . matches the third choice

Answer:

C

Step-by-step explanation:

y = -f(x) is the reflection about the x-axis of the graph y = f(x).

Answer:

12

Step-by-step explanation:

Answer:

Perimeter = 69.4 cm

Area = 299.92 square cm

Step-by-step explanation:

Given:

length of rectangle (l) = 18.4 cm

Width of rectangle (w) = 16.3 cm

a) Perimeter of rectangle

    = 2( l + w)

    = 2 ( 18.4+16.3)

     = 2 * 34.7

     = 69.4 cm

b) Area of rectangle = lw = 18.4*16.3 = 299.92 square cm

Answer:

x = 20/9

Step-by-step explanation:

2 + 9x - 22 = 0

Combine like terms

9x - 20 =0

Add 20 to each side

9x-20 +20 =  20

9x = 20

divide each side by 9

9x/9 = 20/9

x = 20/9

Let [tex]y=ab^x,[/tex] as described in the problem statement. Plugging in [tex]x=2[/tex] and [tex]x=5[/tex] gives us the equations [tex]18=ab^2[/tex] and [tex]60.75=ab^5.[/tex] Since [tex]a,b[/tex] are nonzero, we divide the second equation by the first to get [tex]\frac{27}{8}=b^3,[/tex] which means that [tex]b=\frac{3}{2},[/tex] after taking the cube root. Plugging this value for [tex]b[/tex] into the first equation, we now have [tex]18=a(3/2)^2=\frac{9a}{4}.[/tex] Solving gives [tex]a=8,[/tex] and our desired exponential equation is [tex]\boxed{y=8\left(\frac{3}{2}\right)^x}.[/tex]

Answer: The no. thought is 5.5

Step-by-step explanation: Let the no. thought be ' x '

2x - 2 = 9

2x = 9+2

2x = 11

x = 11/2 = 5.5

Answer:

1 .i think it is d

Step-by-step explanation:

Answer:

Step-by-step explanation:

Choose the correct option

Answer:

27 m² (blue fabric)

9 m² (brown fabric)

Step-by-step explanation:

Area of a triangle = 1/2*base *height

Area of 4 triangles = 4* 1/2*3*4.5 = 27 m² (blue fabric)

Area of a square = side² = 3² = 9 m² (brown fabric)

Answer:

35

Step-by-step explanation:

Equation:

(-6/5)x - 4 = -46

Add 4 on both sides:

(-6/5)x - 4 = -46

           +4     +4

(-6/5)x = -42

Multiply both sides by the reciprocal, or opposite:

-5/6[(-6/5)x] = (-42)-5/6

x = 35

Therefore, x is equal to 35.

Answer:

       x = 35

Step-by-step explanation:

Step  1  :  6/5 Simplify

Step  2  :

Rewriting the whole as an Equivalent Fraction

Adding fractions that have a common denominator

Step  3  

Rewriting the whole as an Equivalent Fraction

Answer:  x = 35

Hope this helps.

Answer:

D = (x+6)² = 13

Step-by-step explanation:

In the attached file

Answer:

answer is

[tex]-0.245 \pm2.160(0.205)[/tex]

Step-by-step explanation:

After working this way for 6 months he takes a simple random sample of 15 days. He records how long he walked that day (in hours) as recorded by his fitness watch as well as his billable hours for that day as recorded by a work app on his computer.

Slope is -0.245

Sample size  n = 15

Standard error is 0.205

Confidence level 95

Sognificance level is (100 - 95)% = 0.05

Degree of freedom is n -2 = 15 -2 = 13

Critical Value =2.16 = [using excel = TINV (0.05, 13)]

Marginal Error = Critical Value * standard error

= 2.16 * 0.205

= 0.4428

[tex]-0.245 \pm2.160(0.205)[/tex]

Answer:

The correct answer is C. [-0.245±2.160*0.205]

Step-by-step explanation:

Hello!

To analyze the if walking while working (independent variable X) affects his working productivity (dependent variable Y) James took a random sample of 15 days (from a 6 month period in which he worked and trained at home) and recorded how long he walked and his billable hours for that day.

Using this information he estimated the linear regression between the working productivity and the time spent training.

^Y= 7.785 -0.245X

The interest is to estimate the change in the average number of billable hours every time he increases the time spent walking in 1 hour.

To estimate the range of values the average billable hours may take each time the training time increases sone hour, you have to calculate a confidence interval for the population slope of the regression. The statistic is a t-test:

[tex]t= \frac{b-\beta}{Sb} ~~t_{n-1}[/tex]

[b±[tex]t_{n-2;1-\alpha /2}[/tex]*Sb]

Using a 95% confidence level the value of t is [tex]t_{n-2;1-\alpha /2}= t_{13; 0.975}= 2.160[/tex]

b= -0.245

Sb= 0.205

[-0.245±2.160*0.205]

[-0.68780.1978]

Using a 95% confidence level you'd expect the interval [-0.68780.1978] to contain the value of the average billable hours when the time spent walking increases in 1 hour.

I hope this helps!

Answer:

you should count how many time two or more line touches each other

Answer:

If you want to know where a line intercepts the y axis then you make substitute x for 0 and solve for y. If you want to know the intercepts for the x axis, then substitute y for 0 and solve for x.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Complete Question

With individual lines at the checkouts, a store manager finds that the standard deviation for the waiting times on Monday mornings is 5.7 minutes. After switching to a single waiting line, he finds that for a random sample of A customers, the waiting times have a standard deviation of B minutes.

a) Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.

If we let italic sigma be the population standard deviation of waiting times for a single line, what are the hypotheses for this test?

Use the traditional method to test the claim. Assume the population of waiting times is normally distributed.

Calculate the test statistic for this test, italic chi to the power of 2 . Round your answer to three digits to the right of the decimal point.

What is the critical value for this left-tailed test? Round your answer to three digits to the right of the decimal point.

Based on the critical value and test statistic, should the null hypothesis be rejected?

Since the claim is the alternative hypothesis, what final conclusion can you draw from this test?

1) Null and Alternative hypothesis

Null hypothesis: H₀ = 5.7

and Alternative hypothesis: H₁ < 5.7

2) Test Statistic

[tex]x^2=\frac{(n-1)s^2}{\sigma^2}[/tex]

where s is the standard deviation = 4.9

n sample size = 29

[tex]=\frac{28 \times 4.9^2}{5.7^2} \\\\=20.692[/tex]

complete solution is detailed in the image

Answer:

(-3,-1)

Step-by-step explanation:

When you graph it on a graphing paper, you can see that the graph touches it but barely

Answer:

4,245 miles

Step-by-step explanation:

Hello there,

the reason the answer is 4245 is because its says per minute therefore each minute of the rocket is going 283 miles and when it ask how miles did it travel in 15 minutes u just multiply 283 and 15 which gets you the answer 4245 miles

         Hope dis helps.

Step-by-step explanation:

Step 1:  Multiply them together

Miles Per Minute * Minutes = Miles Traveled

283 * 15 = Miles Traveled

4245 = Miles Traveled

Answer: The rocket will travel 4,245 miles

Average for 3 races to be 28.0, the total times need to equal 28 x 3 = 84 seconds.

84 - 26.3 - 30.3 = 27.4

Her third time was 27.4 seconds.

Answer:

27.4 seconds

Step-by-step explanation:

Answer:

  y = x^2 +2x +1

Step-by-step explanation:

Let's see how this works.

Two of the given points have the same y-value, so the axis of symmetry is located halfway between. If we translate the desired curve down 1 unit, those symmetrical values become zeros, and our function will look like ...

  f(x) = ax(x +2)

We want this to go through the third point, also translated down by 1 unit, so we have ...

  3 = a(1)(1+2) = 3a

That is, a=1, so f(x) = x(x+2) and translating that up 1 unit gives our desired function:

  y = x(x+2) +1

  y = x^2 +2x +1

_____

Using the quadratic regression function of a graphing calculator gives the same result.

_____

Comment on the solution approach

For arbitrary points, one would generally substitute them into the formula for  the function you want:

  y = ax^2 +bx +c

to get three equations in the parameters a, b, and c. These equations would be solved to find the desired coefficients. As noted elsewhere, one of the given points for this problem is the y-intercept (0, 1), so right away we know c = 1. ("c" is the y-intercept.)

That leaves two remaining equations in two unknowns (using the other two points).

Using the point (-2, 1), the equation is ...

  1 = a(-2)^2 +b(-2) +1   ⇒   4a - 2b = 0   ⇒   2a -b = 0

Using the point (1, 4), the equation is ...

  4 = a(1^2) +b(1) +1   ⇒   a +b = 3

Adding these gives 3a = 3, or a=1. Then substitution gives b=2, so the final equation is ...

  y = x^2 +2x +1

Answer:

20, -20, -6, 6

Step-by-step explanation:

x and y could be negative or positive.

Answer:

Answer shown from explanation

Step-by-step explanation:

|x| means modulus of x such that positive or negative value of x evaluates to a positive value.

|x| = 7 is the same as x = -7 and x = 7

Similarly,

|y| = 13 is the same as y = -13 and y= 13;

Hence the possible values are;

7+13= 20

7-13= -6

-7-13= -20

-7 + 13 = 6

Answer:

The function g(x) is odd.

Step-by-step explanation:

Even and odd functions:

If for every value of x, f(x) = f(-x), the function is even.

If for every value of x, f(x) = -f(x), the function is odd.

If those statements are false, the function is neither even nor odd.

In this question:

[tex]g(x) = x^{3}[/tex]

[tex]g(-x) = (-x)^{3} = -x^{3} = -g(x)[/tex]

Since g(x) = -g(-x), the function g(x) is odd.

So the right answer is 14.

Look at the attached picture

Hope it will help you

Good luck on your assignment

Answer:

Boys 4/9 ; 5/9 Girls

Step-by-step explanation

Boys 4:5 Girls

Total pupil = 9

The fraction of boys in the class is 4/9

The fraction of girls in the class is 5/9

Answer:

Step-by-step explanation:

You can observe a representation of this problem in the image attached.

Notice that the grass seed is gonna be put only in the green zone, out of the pond. So, we need to find each area and subtract them.

[tex]A_{garden}= 14 \times 9 =126 \ m^{2} \\A_{pond}=2.4 \times 3.8 = 9.12 \ m^{2}[/tex]

The difference is

[tex]A_{seed}=126 - 9.12 = 116.88 \ m^{2}[/tex]

Now, according to the problem, one box of grass seed covers 15 meters of the garden, let's divide this number with the seed area.

[tex]n=\frac{116.88}{15} \approx 7.792[/tex]

Therefore, Kayla needs 8 boxes of grass seed to cover the whole garden without including the pond.