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A fashion designer wants to estimate the average price that people will be willing to pay for her new designer jeans. She wants her estimate

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A fashion designer wants to estimate the average price that people will be willing to pay for her new designer jeans. She wants her estimate to be within $3.25 of the true average price with 93% confidence. It is known that the population standard deviation is $21. How many potential customers should she sample for her requirements to be satisfied? (Your answer must be a whole number.) customers

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