A local trucking company fitted a regression to relate the travel time (days) of its shipments as a function of the distance traveled (miles). The fitted regression is Time = -7.126 + .0214 Distance, based on a sample of 20 shipments. The estimated standard error of the slope is 0.0053. Find the critical value for a right-tailed test to see if the slope is positive, using α = .05.
A)2.101
B)2.552
C)1.960
D)1.734

Question

Quizplus · Accepted Answer

The critical value for a right-tailed t-test with 18 degrees of freedom (20-2) at α = 0.05 is approximately 1.734.

A Local Trucking Company Fitted a Regression to Relate the Travel