A researcher is using a chisquare test to determine whether

A researcher is using a chi-square test to determine whether there are any preferences among 4 brands of orange juice. With alpha = 0.05 and n = 30, the critical region for the hypothesis test would have a boundary of:

Solution

from chi square table with 4-1 = 3 DF at 0.05 level, answer b) 7.81