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(Step-by-Step) A computer repair person believes that the mean repair cost for damaged computers is $175.00. To test this claim, he randomly selected nine

Question: A computer repair person believes that the mean repair cost for damaged computers is $175.00. To test this claim, he randomly selected nine computer Invoices from his accounts receivables and computed the average repair cost to be $200.00 with a standard deviation of $38.00. At a ten percent significance level Is there sufficient evidence to support his claim? Assume the population standard deviation is unknown.

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