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. TheXcolumn indicates the number of client contacts last month and theYcolumn shows the value of sales ($ thousands) last month for each client sampled.

Number of Contacts,x Sales ($ thousands),y Number of Contacts,x Sales ($ thousands),y

14 24 23 30

12 14 48 90

20 28 50 85

16 30 55 120

46 80 50 110

a.Determine the standard error of estimate.(Round your answer to 2 decimal places.)

Standard error of estimate____________

b.Determine the coefficient of determination.(Round your answer to 2 decimal places.)

Coefficient of determination____________

c.Interpret the coefficient of determination.(Round your answer to the nearest whole number.)

________percent of the variation in sales can be explained by the variation in the number of contacts.