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You want to obtain a sample to estimate how much people spend on Valentine's Day. Based on previous study, you believe the population standard deviation

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You want to obtain a sample to estimate how much people spend on Valentine's Day. Based on previous study, you believe the population standard deviation is approximately o = 30.6 dollars. You would like to be 99% confident that your estimate is within 10 dollar(s) of average spending on Valentine's Day. How many people do you have to sample? Do not round mid-calculation

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