to learn about how number of hours worked per week and number of hours spent watching television in a typical week are related each person in a sample size of 40 was asked to keep a log of hours worked in a log of hours spent watching television in one week at the end of the week, each person reported the total number of hours spent on each activity. How many variables are in the data set are the variables categorical or numerical Would the purpose of the graphical display be to display the data distribution to compare groups or to investigate the relationship between two numerical variables