Mathematics, 27.04.2021 15:00, kkeith121p6ujlt

In a survey, 18 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a sample mean of $47 and sample standard deviation of $3. Construct a confidence interval at a 90% confidence level.

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In a survey, 18 people were asked how much they spent on their child's last birthday gift. The resul...