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7/21/2019 Question 12 8 / 8 points The results of sampling independent populations: sample 1 from population 1 . mean 80 population variance 3 sample size 25 sample 2 from population 2 . mean 81 population variance 2 sample size 50 Note that the population variances are known. Test HO: (population1 mean - population2 mean) s 0 at x = 0.05. HA: (population1 mean - population2 mean) > 0. This is a one-tailed test with upper reject region and positive critical value. Pvalue 0.0062. HO rejected. Conclude difference of means > 0. Pvalue 0.0124. HO rejected. Conclude difference of means > 0. Pvalue 0.9938. HO not rejected. Conclude difference of means s 0 is plausible Question 13 0 / 8 points The results of sampling independent populations: sample 1 from population 1 sample 2 from population 2 mean 1000 mean 1250 sample standard deviation 400 sample standard deviation 500 sample size 50 sample size 75 Test the HO: population1 mean = population2 mean at Critical value of -1.29. HO rejected. Conclude difference of means = 0 Test statistic of 65.28 > Critical value of -2.36. HO is not rejected. Conclude difference of means = 0. Test statistic of -3.09