Question

Observations are taken on sales of a certain mountain bike in 22 sporting goods stores. The regression model was Y total sales (thousands of dollars), X1- display floor space (square meters), X2- competitors' advertising expenditures (thousands of dollars), X3 advertised price (dollars per unit). (a) Fill in the values in the table given here. (Negative values should be indicated by a minus sign. Leave no cells blank be certain to enter "O" wherever required. Round your t-values to 3 decimal places and p-values to 4 decimal places.) Coefficient SE calc p-value Intercept FloorSpace 1,285.3 357.1 11.322 1.57 Competing Ads 6.682 3.904 0.141230.08485 Price (b-1) What is the critical value of Student's t in Appendix D for a two-tailed test at a 0.01 (Round your answer to 3 decimal places.) t-value-

Answer 1

a)

b-1) The critical value of student's t for a two tailed test at $\alpha = 0.01$

$=t_{\frac{0.01}{2},n-2}=t_{0.005,20} = 2.84534$