you work for a consumer advocacy agency and want to find the mean repair cost of a washing machine. As…

you work for a consumer advocacy agency and want to find the mean repair cost of a washing machine. As…

you work for a consumer advocacy agency and want to find the mean repair cost of a washing machine. As part of your study, you randomly select 45 repair costs and find the mean to be $116.00. the sample standard deviation is $19.20. construct a 90 confidence interval for the population mean repair cost

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