In Exercises 1, test the given claim. Use a significance level of α = 0.05, and assume that all populations are normally distributed. Use the traditional method of testing hypotheses outlined in Figure 7-4.
Claim: Populations A and B have the same mean (/A, = /n,). Sample A: «, = 10, 5c, = 75,

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Sample A: ni = 10, xi = 75, si-15 Sample B: n2-10, x2-80, s) = 12