A grocery store manager decided to investigate whether slower moving items would sell quicker if these items were displayed at the end of the grocery store aisles or with a special florescent shelf tag displaying the price. The manager is interested in these nonprice reduction promotions because the store has only a small markup on these items. The manager decides to use end of aisle displays, shelf markers, and no special markers for four weeks each measuring unit sales at the end of each week. The following sales patterns were observed:

(Use the above information to answer the following three questions.)
-How many degrees of freedom does the denominator of the F ratio in the ANOVA table have?
A) 2
B) 11
C) 9
D) 6
E) none of the above

Question

A grocery store manager decided to investigate whether slower moving items would sell quicker if these items were displayed at the end of the grocery store aisles or with a special florescent shelf tag displaying the price. The manager is interested in these nonprice reduction promotions because the store has only a small markup on these items. The manager decides to use end of aisle displays, shelf markers, and no special markers for four weeks each measuring unit sales at the end of each week. The following sales patterns were observed:
  
(Use the above information to answer the following three questions.)
-How many degrees of freedom does the denominator of the F ratio in the ANOVA table have?
A) 2 
B) 11 
C) 9 
D) 6 
E) none of the above

Quizplus · Accepted Answer

The denominator of the F ratio in the ANOVA table has 9 degrees of freedom because it is the mean square error, which is calculated by dividing the sum of squared errors by the degrees of freedom for error. In this case, there are 9 degrees of freedom for error because there are 11 observations and 2 groups.

A Grocery Store Manager Decided to Investigate Whether Slower Moving