Exhibit 12-4
Regression analysis was applied between sales data Y in $1,000s) and advertising data x in $100s) and the following information was obtained.
= 12 + 1.8 x
$\hat { Y }$ n = 17
SSR = 225
SSE = 75
Sb₁ = 0.2683
-Refer to Exhibit 12-4. The critical t value for testing the significance of the slope at 95% confidence is
A) 1.753
B) 2.131
C) 1.746
D) 2.120

Question

Exhibit 12-4
Regression analysis was applied between sales data Y in $1,000s) and advertising data x in $100s) and the following information was obtained.
= 12 + 1.8 x
 $\hat { Y }$ n = 17
SSR = 225
SSE = 75
Sb₁ = 0.2683
-Refer to Exhibit 12-4. The critical t value for testing the significance of the slope at 95% confidence is
A) 1.753
B) 2.131
C) 1.746
D) 2.120

Quizplus · Accepted Answer

The critical t value is determined by the degrees of freedom (n-2) and the confidence level. With n = 17, degrees of freedom = 15. For a 95% confidence level, the critical t value from the t-distribution table is approximately 2.131.

Exhibit 12-4 Regression Analysis Was Applied Between Sales Data Y Y^\hat { Y }Y^

Exhibit 12-4
Regression Analysis Was Applied Between Sales Data Y $\hat { Y }$