J A 7. Watsamatta University. Public relations staff at Wat- samatta U. collected data on people's opinions of vari- 0us colleges and universities in their state. They phoned 850 local residents. After identifying them- selves, the callers asked the survey participants their ages, whether they had attended college, and whether they had a favorable opinion of the university. The offi- cial report to the university's directors claimed that, in general, people had very favorable opinions about Wat- samatta U. 3) Identify the W's of these data. b) Identify the variables, classify each as categorical or quantitative, and specify units if relevant. c) Are you confident about the report's conclusion? Explain. 9. Fraud detection. A credit card bank is investigating the incidence of fraudulent card use. The bank suspects that the type of product bought may provide clues to the fraud. To examine this situation, the bank looks at the Standard Industrial Code (SIC) of the business re- lated to the transaction. This is a code that was used by the US. Census Bureau and Statistics Canada to iden- tify the type of business of every registered business in North America? For example, 1011 designates Meat and Meat Products {except Poultry), 1012 is Poultry Products, 1021 is Fish Products, 1031 is Canned and Preserved Fruits and Vegetables, and 1032 is Frozen Fruits and Vegetables. data? T 11. Cramming. One Thursday, researchers gave students enrolled in a section of basic Spanish a set of 50 new vo- cabulary words to memorize. On Friday the students took a vocabulary test. When they returned to class the following Monday they were retested-without advance warning. Both sets of test scores for the 28 students are shown.Fri Mon Fri Mon 42 36 50 47 44 44 34 34 45 46 38 31 38 43 40 40 39 41 38 46 32 37 37 36 31 40 31 32 41 32 37 48 39 41 37 31 45 32 36 41 47 44 a) Create a graphical display to compare the two distri- butions of scores. b) Write a few sentences about the scores reported on Friday and Monday. c) Create a graphical display showing the distribution of the changes in student scores. d) Describe the distribution of changes