Consider the test of H0: σ2 = 7 against H1: σ2 ≠ 7. What are the
critical values for the test statistic chi-square for the following
significance levels and sample sizes? a)
α=0.01andn=20 b) α=0.05andn=12
c) α=0.10andn=15
a) α=0.01 and n=20
Degree of freedom =n-1=20-1=19
.......................by using chi square critical value table or Excel command =CHIINV(1-(0.01/2),19)
............by using chi square critical value table or Excel command =CHIINV((0.01/2),19)
b) α=0.05 and n=12
Degree of freedom =n-1=12-1=11
c) α=0.10 and n=15
Degree of freedom =n-1=15-1=14
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