Use the following scenario for questions 1 through 4: Shopping malls are more than the places where we buy things. We go to malls to watch movies; buy breakfast, lunch, and dinner; exercise; meet friends; and, in general, to socialize. News media, however, reports that the amount of time spent at malls has decreased over the past three years. To test this assertion, a sociologist collected data from a sample of 100 random mall shoppers and asked a variety of questions. The same survey was first conducted 3 years ago with another random sample of 100 shoppers. In both surveys, respondents were asked to report the number of hours they spend in malls during an average week. The data were stored in the excel data file in the following way (this is just a subset of data provided as an illustration):