Observations are taken on sales of a certain mountain bike i

Observations are taken on sales of a certain mountain bike in 30 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).

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.)

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.

Solution

a)

b-1.

Here, df = n - k - 1 = 30 - 3 - 1 = 26.

Thus, at alpha = 0.01, 2 tailed,

tcrit = 2.778714533 [ANSWER]

b-2.

As the only one which exceeded the critical value,

A) Only FloorSpace differs significantly from zero. [ANSWER]