Solve clearly

4 Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The X 10 column indicates the number of client contacts last month, and the Y column shows the points value of sales ($ thousands) last month for each client sampled. (Round the final answers to 2 decimal places.) Skipped Sales Sales Number of Number of ($ eBook Contacts, thousands) , Contacts, thousands ) , X F X 19 $34 $21 References 18 20 35 14 21 34 50 16 21 29 31 28 47 27 34 25 34 a. Determine the 90% confidence interval, in thousands of dollars, for the mean of all sales personnel who make 56 contacts. b. Determine the 90% prediction interval, in thousands of dollars, for a particular salesperson who makes 56 contacts