answer all questions with explanation

QUESTION 3 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. n =10 n =10 E x; =334 & Z yi=615 & xx = 2814.4 & Syy = 14454.5 & Sxy = 6243 & SSE = 606.06 a) Determine the regression equation. B, = & Bo = b) Determine the estimated sales if 40 contacts are made. c) Can we conclude that number of contacts affect the sales positively? Use the .05 significance level. Since the test statistic and the critical value we (reject Ho or don't reject Ho) d) Determine the .95 confidence interval, in thousands of dollars, for the mean of all sales personnel who make 40 contacts. lower limit and upper limit e) Determine the .95 prediction interval, in thousands of dollars, for a particular salesperson who makes 40 contacts. lower limit and upper limit