Question

1.

The _____ of a poll tells the percentage of such polls in which the confidence interval

includes the true result.

Select one:

a. correlation

b. margin of error

c. confidence level

d. interpolation

e. None of these

2.

The heights of American women between the ages of 18 and 24 are approximately normally distributed. The mean is 64.1 inches and the standard deviation is 2.5 inches. What percentage of such women is below 69 inches?

Select one:

a. 98%

b. 2%

c. 84%

d. 5%

e. None of these

3.

You invest $3000 in an account that pays simple interest of 3% each year. Find the interest earned after seven years.

Select one:

a. $400

b. $590

c. $630

d. $350

e. $240

4.

A polling firm finds that 58% of the population of a state favors legalizing the use of marijuana. The margin of error of the poll is 4%.

If the confidence level is 95% then about how many people were polled? Round up.

Select one:

a. None of these

b. 294

c. 518

d. 394

e. 625

5.

Michael's five test scores in his physics class were 75, 67, 88, 91, and 84. What was his
median test score?

Select one:

a. 79

b. 81

c. 84

d. 88

e. None of these

Answer 1

The p value from z score is obtained from STATKEY (image attached for reference). The magin of error is mentioned and using that we calculate the sample size. The critical value is obtained from STATKEY (image attached for reference). Median refers to the middle number when numbers are arranged in the ascending order.