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In a survey, 15 people were asked how much they spent on their child's last birthday gift. The results were roughly bellshaped with a mean

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In a survey, 15 people were asked how much they spent on their child's last birthday gift. The results were roughly bellshaped with a mean of $43 and standard deviation of $1 1. Construct a confidence interval at a 90% confidence level. Give your answers to one decimal place

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