A chain of fast food restaurants wants to compare the average service times at four different restaurants.They want to conduct a hypothesis test to determine if all four means are the same or not.If
n = 10 observations are taken at each of the four restaurants,then the degrees of freedom are D₁ = 39 and D₂ = 3.

Question

Quizplus · Accepted Answer

The formula for degrees of freedom in a one-way ANOVA with four groups is DFbetween = k - 1 and DFwithin = N - k, where k is the number of groups and N is the total sample size. In this case, k = 4 and N = 40. Therefore, DFbetween = 3 and DFwithin = 36. The degrees of freedom given in the question are incorrect.

A Chain of Fast Food Restaurants Wants to Compare the Average