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Data on the automotive industry and automobile purchasing characteristics were presented in Financial World. The mean car payment per month was reported to be $310.

Data on the automotive industry and automobile purchasing characteristics were presented in Financial World. The mean car payment per month was reported to be $310. Assume that this result was based on a sample of 25 car payment records and that the sample standard deviation was $100. Construct a 90% and 95% confidence interval to estimate the population mean car payment.

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