Question 12 (Mandatory) (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) 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 0.9938. HO not rejected. Conclude difference of means s 0 is plausible Pvalue 0.0124. HO rejected. Conclude difference of means > 0