Mathematics, 22.04.2020 16:29, ljcervantes4824

In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $49 and standard deviation of $8. Find the margin of error at a 80% confidence level. Give your answer to two decimal places.

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In a survey, 31 people were asked how much they spent on their child's last birthday gift. The resul...