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# 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. 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 your answers to 3 decimal places.)

Number of Contacts, Sales (\$ thousands), Y Number of Contacts, X Sales (\$ thousands),

X Y X Y

14 24 23 30

12 14 48 90

20 28 50 85

16 30 55 120

46 80 50 110

a. Determine the .95 confidence interval, in thousands of dollars, for the mean of all sales personnel who make 40 contacts. [_______ ,_______ ]

b. Determine the .95 prediction interval, in thousands of dollars, for a particular salesperson who makes 40 contacts.

[_________ , _________ ]

Aug 01 2020 View more View Less