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A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random

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A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random _Nonproctored samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) ll \"1 P2 below. In 30 31 )2 74.05 85.59 3 11.05 21.86

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