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 column indicates the number of client contacts last month, and the Y column shows the value of sales ($ thousands) last month for each client sampled. (Round the final answers to 2 decimal places.)

Number of Contacts, X	Sales ($ thousands), Y	Number of Contacts, X	Sales ($ thousands), Y
43	$63	22	$26
37	60	26	49
34	30	44	67
29	41	41	67
22	33	13	25

a.Determine the 95% confidence interval, in thousands of dollars, for the mean of all sales personnel who make 35 contacts.

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b.Determine the 95% prediction interval, in thousands of dollars, for a particular salesperson who makes 35 contacts.

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