SCENARIO 18-12
the Marketing Manager for a Nationally Franchised Lawn $\beta$

Multiple Choice

SCENARIO 18-12
The marketing manager for a nationally franchised lawn service company would like to study the characteristics that differentiate home owners who do and do not have a lawn service. A random sample of 30 home owners located in a suburban area near a large city was selected; 15 did not have a lawn service (code 0) and 15 had a lawn service (code 1) . Additional information available concerning these 30 home owners includes family income (Income, in thousands of dollars) , lawn size (Lawn Size, in thousands of square feet) , attitude toward outdoor recreational activities (Attitude 0 = unfavorable, 1 = favorable) , number of teenagers in the household (Teenager) , and age of the head of the household (Age) . The Minitab output is given below:

-Referring to Scenario 18-10 Model 1,which of the following is the correct null hypothesis to test whether age has any effect on the number of weeks a worker is unemployed due to a layoff while holding constant the effect of all the other independent variables?

A) H₀ : $\beta$ ₀ = 0
B) H₀ : $\beta$ ₁ = 0
C) H₀ : $\beta$ ₂ = 0
D) H₀ : $\beta$ ₃ = 0