QUESTION 56 Suppose the marketing manager who was earning $129,420 got a raise and is now earning $140,000. Indicate how this change would affect the median of summary statistics. 0 Increase O Decrease 0 Stay the same 0 DonGt know QUESTION 57 City ofcials want to estimate the proportion of visitors who are repeat visitors to the city parks. Suppose they nd they need a sample size of 1 5,000 people to achieve a margin of error of :0.01 percentage points with 99 percent condence. This sample is too large to be practical. How can they reduce the sample size? 0 Use a lower condence level O Use a smaller margin oferror 0 Use a higher level of condence 0 Conduct a census QUESTION 58 The owner of a smalt convenience store is trying to decide whether to discontinue selling magazines. He suspects that only 5% of the customers buy magazines and thinks that he might be able to sell something more protable. Before making a nal decision. he keeps track of the number of customers who buy magazines each day. On a typical day he has 280 customers in his store. On a typical day. what would be the mean number of customers who buy magazines? 0 230 O O O 266 014 QUESTION 59 Vending machines on a college campus offer a variety of drinks. The purchasing agent believes that each type of drink is equally preferred by students and consequently orders equal quantities. The number of drinks sold from vending machines on this campus for the last six months is shown in the following table. Drink Lemon Kiwi Punch Grape Purchase Frequency 159 193 174 149 Ifthe value of the chi-square test statistic is 8.012, and the critical value of chi-square at a|p1a= 0.05 is 7.82, 0 We reject the null hypothesis O We fail to reject the null hypothesis 0 We conclude that the purchasing agent was not correct 0 We reject the null hypothesis and conclude that the purchasing agent was not correct