The Results Of Sampling Independent Populations (1)

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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 – population 2 mean) < 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