A manufacturer of automobile transmissions uses three different processes. Management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown next. In an ANOVA table, what are the degrees of freedom for the treatment source of variation?
A) 2
B) 3
C) 10
D) 27

Question

A manufacturer of automobile transmissions uses three different processes. Management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown next.  In an ANOVA table, what are the degrees of freedom for the treatment source of variation?
A) 2 
B) 3 
C) 10 
D) 27

Quizplus · Accepted Answer

The degrees of freedom for the treatment source of variation is equal to the number of processes minus one, which is 3-1=2. The degrees of freedom for the error source of variation is equal to the total sample size minus the number of processes, which is 30-3=27.

A Manufacturer of Automobile Transmissions Uses Three Different Processes