Two independent random samples have been selected, 100 observations from population 1 and 120 from population 2. Sample means š1 = 60 and x2 = 50 were obtained. From previous experience with these populations, it is known that the variances are 0,² = 64 and o2² = 100. Test the claim that the difference in the mear of the 2 populations is equal to 5. Use a=0.02.

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