2.

You may need to use the appropriate technology to answer this question. A regression model relating x, number of salespersons at a branch office, to y, annual sales at the office (in thousands of dollars) provided the following computer output from a regression analysis of the data. Analysis of Variance SOURCE DF Adj SS Adj MS Regression 1 6828 .6 6828 . 6 Error 28 2298.8 82.1 Total 29 9127 . 4 Predictor Coef SE Coef T Constant 80.0 11.333 7. 06 X 50 . 0 5 . 482 9 . 12 Regression Equation Y : 80.0 + 50.00 X (a) Write the estimated regression equation. f: (b) How many branch ofces were involved in the study? l:l (c) Compute the Fstatistic and test the signicance of the relationship at a 0.05 level of significance. State the null and alternative hypotheses. O H0: 191 = o Haj?1 : 0 O H0:10 = 0 Ha: 50 2 0 O H0: [91 2 D Haj?1