Question: Jim, the manager of Supermarket, Inc., wants to know if the percentage of Pepsi sales (compared to all soft drink sales) has changed in the past year. Last year Pepsi’s percentage of overall soft drink sales was 37%. Jim took a sample of 867 2-litre soft drink sales, and Pepsi accounted for 289. Has the percentage of Pepsi sales changed since last year? Use a .05 level of significance.