In a survey, 13 people were asked how much they spent on their child's last birthday gift

Subject:MathPrice:3.86 Bought9

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In a survey, 13 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44 and standard deviation of $8. Use the theory-based inference applet to find the confidence interval at a 80% confidence level. Give your answers to one decimal place.

• We are 80% confident that the average (mean) amount that people spent on their child's last birthday gift, μ, was between  **** dollars and   **** dollars.
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• The sample statistic is  ****  dollars. 
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• The margin of error is  ****  dollars.
• The confidence interval can be written as ****  dollars  ±  **** dollars.