The number of degrees of freedom for the denominator in one-way ANOVA test involving 4 population means with 15 observations sampled from each population is:
A)60
B)19
C)56
D)45

Question

Quizplus · Accepted Answer

The degrees of freedom for the denominator in one-way ANOVA test involving 4 population means with 15 observations sampled from each population is given by:

df = (n-1) * (number of groups - 1) 
where n = sample size (15) and number of groups = 4

Therefore, df = (15-1) * (4-1) = 56.

Hence, the correct answer is C.

The Number of Degrees of Freedom for the Denominator in One-Way