A consumer magazine wants to figure out which of two major airlines lost a higher proportion of luggage on international flights. The magazine surveyed Standard Air (population 1) and Down Under airlines (population 2). Standard Air lost 38 out of 510 bags. Down Under airlines lost 28 of 460 bags. Does Standard Air have a higher population proportion of lost bags on international flights? Which of the following is the correct value of the test statistic?Multiple Choicez = 0.842t968 = 0.842z = −0.842t968 = −0.842

A recent Health of Boston report suggests that 14% of female residents suffer from asthma as opposed to 6% of males. Suppose 250 females and 200 males responded to the study. Which of the following is the correct value of the test statistics?Multiple Choice−1.76−2.761.762.76

10.  Let p equal the proportion of drivers who use a seat belt in a state that does not have a mandatory seat belt law. It was claimed that p = 0.14. An advertising campaign was conducted to increase this proportion. Two months after the campaign, 104 out of a random sample of 590 drivers were wearing seat belts. What is the test-statistic value in the given problem?*A. z = 0.176B. z = 2.80C. z = 2.52D. z = 14.56

A new airline has just expanded its network to Australia and is interested in determining the proportion of its Australian customers who are flying overseas for business.  Based on its experience in other markets, the airline estimates that the population proportion is 30%. It wants its confidence level to be 98%, and the error to be within 5%. How many random customers should the airline survey?

An on-line retailing firm conducts a study into the number of on-line purchases of footwear made during all of last year.   The study wants to determine the proportion of Australians over the age of 25 who purchase footwear on-line. The managing director of the on-line retailing firm believes this proportion of Australians is 22%. A random sample of 179 Australians over the age of 25 is selected. If the managing director’s claim is true, what is the sample proportion value below which 10% of all sample proportions would exist? Express your answer correct to two decimal places.

An investigator wants to assess whether the mean (mu) = the average weight of passengers flying on small planes exceeds the FAA guideline of average total weight of 185 pounds (passenger weight including shoes, clothes, and carry-on). Suppose that a random sample of 25 passengers showed an average total weight of 200 pounds with a sample standard deviation of 59.5 pounds. Assume that passenger total weights are normally distributed. Which of the following is an appropriate conclusion (alpha= .05)? Group of answer choicesnull hypothesis should be revisedthe average total weight of all passengers appears to be not greater than 185 pounds.the average total weight of all passengers appears to be greater than 185 pounds.