Observations are taken on sales of a certain mountain bike in 20 sporting goods stores....
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Observations are taken on sales of a certain mountain bike in 20 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
1,271.3
337.9
FloorSpace
11.001
1.80
Competing Ads
-6.820
3.995
Price
-0.14882
0.08678
(b-1) What is the critical value of Student's t in Appendix D for a two-tailed test at = .01? (Round your answer to 3 decimal places.)t-value = (b-2) Choose the correct option.
multiple choice
Only CompetingAds differs significantly from zero.
Only FloorSpace differs significantly from zero.
Only Price differs significantly from zero.
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