Which of the following will not change the width of a confidence interval? 1.Increasing the ...

Which of the following will not change the width of a confidence interval?
  1.Increasing the population size from 100,000 to 200,000.
  2.Increasing the confidence level from 90 to 95.
  3.Increasing the sample size from 1,000 to 2,000.

Q. 2

A study was conducted to learn about vegetarianism among men and women. Independent random samples of 434 U.S. women and 747 U.S. men were obtained. Of those sampled, 195 women and 276 men said that they sometimes order a dish without meat, fish or fowl when they eat out. Based on the 95 confidence interval of (0.02, 0.14), is it reasonable to conclude that the population proportions who
   sometimes order a dish without meat,
   fish or fowl when they eat out differ for
   women and men?

  1.Yes
  2.No

Q. 3

A study was conducted to learn about vegetarianism among men and women. Independent random samples of 434 U.S. women and 747 U.S. men were obtained. Of those sampled, 195 women and 276 men said that they sometimes order a dish without meat, fish or fowl when they eat out. The 95 confidence interval for the difference between the population proportions of women versus men who sometimes order a dish without meat, fish or fowl when
   they eat out is given by: (0.02, 0.14).
   What is the margin of error for this
   confidence interval estimate?

  1.0.12
  2.0.14
  3.0.02
  4.0.06

Q. 4

A study was conducted to learn about vegetarianism among men and women. Independent random samples of 434 U.S. women and 747 U.S. men were obtained. Of those sampled, 195 women and 276 men said that they sometimes order a dish without meat, fish or fowl when they eat out. What is the estimated difference between the proportions of women versus men who sometimes order a dish without meat, fish or fowl when they eat out?
  1.-81
  2.0.08
  3.-0.08
  4.0.26

Q. 5

A manufacturer of small appliances purchases plastic handles for coffeepots from an outside vendor. If a handle is cracked, it is considered defective and cant be used. A large shipment of plastic handles is received. How many handles from the shipment should be inspected in order to estimate p, the proportion of defective handles in the shipment, with a margin of error of 0.13 or less? (Assume a confidence level of 95).
  1.4 handles
  2.113 handles
  3.57 handles
  4.228 handles
  5.100 handles

Q. 6

What proportion of college students have used cell phones to cheat on an exam? Suppose you have been asked to estimate this proportion for students enrolled at a large college. Make an estimate of the margin of error (M) when there are 151 students in the survey. Assume a 95 confidence level.
  1. M = 0.08
  2. M  0.08
  3. M  0.08
  4.There is not enough information to make an estimate of M.

Q. 7

Suppose that a random sample of 85 high school classrooms in the state of Iowa is selected and a 95 confidence interval for the proportion that has Internet access is (0.73, 0.79). Which of the following is a correct interpretation of the 95 confidence level?
  1.The method used to construct the interval will produce an interval that includes the value of the population proportion about 95 of the time in repeated sampling.
  2.You can be 95 confident that the sample proportion is between 0.73 and 0.79.
  3.There is a 95 chance that the proportion of all high school classrooms in Iowa that have Internet access is between 0.73 and 0.79.
  4.You can be 95 confident that the proportion of all high school classrooms in Iowa that have Internet access is between 0.73 and 0.79.
  5.None of these is a correct interpretation of the confidence level.