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Consider the loan fees charged in percentage for granting a car loan interest rate in NSW; on average, 5.80 with a population standard deviation of

Consider the loan fees charged in percentage for granting a car loan interest rate in NSW; on average, 5.80 with a population standard deviation of 0.40. Suppose the investigator would like to constrain the margin of error to within 0.10. How large a sample needs to compute the 90% confidence interval of the population mean

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