Question: Repeat Exercise 11.20 using the z-test approximation to the unequal-variances t-test. Repeat Exercise 11.20 In two independent samples, x-bar1 = 125.0, s1 = 21.5, n1

Repeat Exercise 11.20 using the z-test approximation to the unequal-variances t-test.
Repeat Exercise 11.20
In two independent samples, x-bar1 = 125.0, s1 = 21.5, n1 = 40, and x-bar2 = 116.4, s2 = 10.8, n2 = 35. Using the 0.025 level of significance, test H0: μ1 ≤ μ2 versus H1: μ1 > μ2.

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