Question

Select the true statement(s). In a two-sample Z test, both sample sizes must be large. In a two-sample Z test, the hypothesized difference in means must be 0. In a two-sample Z test, the observations may be dependent The two-sample Z test can be used only if both population variances are known. A paired data set often involves a before measurement and an after measurement on each individual or object. Incorrect

Answer 1

The solution to this problem is given by

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