For testing H0 : 1 = 2 versus H1: 1 2, we observe s1 = 9.3,
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For testing H0 : σ1 = σ2 versus H1: σ1 ≠ σ2, we observe s1 = 9.3, s2 = 2.1, n1 = 6, and n2 = 13.
Test at the significance level α = 0.05.
a. Find the critical value.
b. Do you reject H0?
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