Question

A researcher recorded the shooting percentage of 28 professional basketball players in each of four quarters in a game. What are the degrees of freedom error for a one-way within-subjects ANOVA?

a. 3
b. 27
c. 81
d. There is not enough information to answer this question

Answer 1

c. 81

Explanation:

The number of ANOVA degrees of freedom is given by the following formula:

`df = (n-1)*(k-1)`

In which n is the size of the sample and k is the number of events.

In this problem, we have that:

`n = 28, k = 4`

So

`df = (n-1)*(k-1)`

`df = 27*3 = 81`

The correct answer is:

c. 81