H a : 1 2 , = 0.01, n 1 = 19, n 2 = 22
Ha: μ1 ≠ μ2, α = 0.01, n1 = 19, n2 = 22
Use Table 5 in Appendix B to find the critical value(s) for the alternative hypothesis, level of significance a, and sample sizes n1 and n2. Assume that the samples are random and independent, the populations are normally distributed, and that the population variances are
(b) Not equal.
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