The college of business was interested in comparing the interaction of Academic status and class time on class attendance. Three different classes were sampled for each cell in the table. The means for each cell follow. What are the error degrees of freedom?
A) 44.
B) 14.
C) 30.
D) 2.

Question

The college of business was interested in comparing the interaction of Academic status and class time on class attendance. Three different classes were sampled for each cell in the table. The means for each cell follow.  What are the error degrees of freedom?
A) 44. 
B) 14. 
C) 30. 
D) 2.

Quizplus · Accepted Answer

To find the error degrees of freedom, we need to use the formula:
(df for error) = (N- the number of cells)
Where N is the total number of observations. 
In this case, there were 3 classes sampled for each cell, and there are 4 cells in the table, which means there were a total of 12 observations. 
Thus, (df for error) = (12 - 4) = 8
However, since there were 2 factors being tested (academic status and class time), we need to subtract 2 from this number, giving us:
(df for error) = (8 - 2) = 6
Therefore, the answer is C.

The College of Business Was Interested in Comparing the Interaction