According to a recent article about individuals who have credit cards, the mean number of cards per person with credit cards is 4. To test this result a random survey of 60 individuals who have credit cards was conducted. The survey only includes the number of credit cards per participant. The results of the survey are attached below. (a) What is the variable of interest in this study? Is it qualitative or quantitative? (b) Do the results of the survey imply that the mean number of cards per individual is less than 4? Use the a=0.05 level of significance. Click the icon to view the data from the survey. The variable of interest is number of credit cards. It is a quantitative variable. (b) Do the results of the survey imply that the mean number of cards per individual is less than 4? Use the a=0.05 level of significance. State the null and alternative hypotheses. Ho H: 4