To compare the mean quarterly revenues of Costco with those ofSam\'s Club, quart

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To compare the mean quarterly revenues of Costco with those ofSam's Club, quarterly sales records of n1 = 250 Costcomembers along with those of n2 = 230 Sam's Club memberswere examine and the following data were collected. The figures arein thousands of dollars. Costco: n1 = 250, x1 =$1.25, s1 = $0.33 Sam's Club: n2 = 230,x2 = $1.75, s2 = $0.35 Let 1 denote the mean quarterly revenues forCostco and 2 the mean quarterly revenues for Sam'sClub. Assume that the standard deviation of two populations aresame. a) Is there sufficient evidence in the data to conclude thatCostco's revenues are less than those of Sam's Club? Set upthe appropiate null alternative hypothesis for this purpose? b) The value of the test statistic is given by To compare the mean quarterly revenues of Costco with those ofSam's Club, quarterly sales records of n1 = 250 Costcomembers along with those of n2 = 230 Sam's Club memberswere examine and the following data were collected. The figures arein thousands of dollars. Costco: n1 = 250, x1 =$1.25, s1 = $0.33 Sam's Club: n2 = 230,x2 = $1.75, s2 = $0.35 Let 1 denote the mean quarterly revenues forCostco and 2 the mean quarterly revenues for Sam'sClub. Assume that the standard deviation of two populations aresame. a) Is there sufficient evidence in the data to conclude thatCostco's revenues are less than those of Sam's Club? Set upthe appropiate null alternative hypothesis for this purpose? b) The value of the test statistic is given by

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To compare the mean quarterly revenues of Costco with those ofSam's Club, quart

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