Two machines are used to fill plastic bottles with liquid laundry detergent. The Standard deviations of fill volume are known to be 0.10 and 0.15fluidounce for the two machines, respectively. Two random samples of = 20bottles from the machine-I and = 25bottles from machine-II are selected,and the sample means fill volume are = 30.5 and = 29.4 fluid ounces.Construct a 90% confidence interval on the mean difference in fill volumes.
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it is math right
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but I don't no to calculate it sorry
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