Regression analysis was applied between sales data (in $1,000s) and advertising data (in $100s) and the following information was obtained.
~
y = 12 + 1.8x
n = 17
SSR = 225
SSE = 75
sb1 = 0.2683
Refer to Exhibit 12-3. The critical F value at a = 0.05 is
a. 3.59
b. 3.68
c. 4.45
d. 4.54