A business analyst wants to explore the relationship between the sales for a pro
ID: 3222571 • Letter: A
Question
A business analyst wants to explore the relationship between the sales for a product (in thousands of dollars) and the possible factors; price (in dollars) and the promotional expenditure(in hundred of dollars). Results of the partial multiple regression analysis are presented below.
Regression Analysis: Sales versus Price, Promotion
The regression equation is
Sales = 12.9 - 6.50 Price + 0.0207 Promotion
Predictor Coef SE Coef T P
Constant 12.8638 0.2425 53.05 0.000
Price -6.4979 0.3575 -18.18 0.000
Promotion 0.02069 0.03811 0.54 0.611
Analysis of Variance
Source DF SS MS F P
Regression 9.1578 4.5789 0.000
Residual Error 0.1222 0.0244
Total 7 9.2800
What are the degrees of freedom for regression and the residual error in the ANOVA table?
Select one:
a. 1 and 6
b. 2 and 5
c. 2 and 6
d. 2 and 4
Explanation / Answer
degree o freedom for regression =SS/MS =9.1578/4.5789 =2
and for residual errror =0.1222/0.0244=5
hence option b) 2 and 5
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