In a survey, 25 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $18. Construct a confidence interval at a 99% confidence level. Give your answers to one decimal place.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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In a survey, 25 people were asked how much they spent on their child’s last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $18. Construct a confidence interval at a 99% confidence level.

Give your answers to one decimal place.

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Transcribed Image Text:In a survey, 25 people were asked how much they spent on their child’s last birthday gift. The results were roughly bell-shaped with a mean of $31 and standard deviation of $18. Construct a confidence interval at a 99% confidence level. Give your answers to one decimal place. [Input boxes for answer]
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