Question

Observations are taken on sales of a certain mountain bike in 28 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 "0" wherever required. Round your t-values to 3 decimal places and p-values to 4 decimal places.)

Predictor	Coefficient	SE	tcalc	p-value
Intercept	1,280.7	385.1	Not attempted	Not attempted
FloorSpace	11.135	1.66	Not attempted	Not attempted
Competing Ads	-6.667	3.981	Not attempted	Not attempted
Price	-0.14503	0.08327	Not attempted

(b-1) What is the critical value of Student's t in Appendix D for a two-tailed test at α = .01? (Round your answer to 3 decimal places.)

t-value =

Answer 1