Comparing Measures of Center and Variability

Question 1

Which statements are true about estimating the population proportion of employees who prefer the new coffee brand? Check all that apply.

Revolt · Accepted Answer

The best estimate of the population proportion is = 74%.; The value of x is 148.

Question 2

The sample size in this problem is students.

Revolt · Accepted Answer

800

Question 3

Which confidence interval represents the estimated proportion of people willing to pay higher prices for gas?

Revolt · Accepted Answer

between 55.3% and 62.7%

Question 4

If the same confidence interval is used, and the same value for is found for both samples, Margie’s margin of error will be David’s margin of error.

Revolt · Accepted Answer

less than

Question 5

The value of 3% represents the .

Revolt · Accepted Answer

margin of error

Question 6

Estimate the population proportion as .

Revolt · Accepted Answer

0.31

Question 7

In the formula n = (1 – ) • , the value of (1 – ) is .

Revolt · Accepted Answer

0.59

Question 8

(1 – ) = .

Revolt · Accepted Answer

0.69

Question 9

When n is calculated, the result after rounding is .

Revolt · Accepted Answer

1,033

Question 10

When the margin of error is calculated using the formula E = z* , to the nearest tenth of a percent, the result is %.

Revolt · Accepted Answer

4.2

Comparing Measures of Center and Variability Answers