Author Question: The primary tool for determining whether the assumptions made about the regression model are ... (Read 129 times)

roselinechinyere27m · **on:** Aug 1, 2018

The primary tool for determining whether the assumptions made about the regression model are appropriate is
a. interval estimation.
b. significance testing.
c. least squares regression.
d. residual analysis.

Question 2

Regression analysis was applied between sales data (y in 1000s) and advertising data (x in 100s) and the following information was obtained. y = 12 + 1.8x n = 17 SSR = 225 SSE = 75 sb1 = .2683 The critical t value for testing the significance of the slope, at a .05 level of significance, is
a. 1.753.
b. 2.131.
c. 1.746.
d. 2.120.