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

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 $35 and standard deviation of $12. Construct a confidence interval at a 99% confidence level.

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Answer #1

35   3.055 ( 12 / 13 )

35   10.1667

( 24.833 , 45.166 )

At 99 %, Confidence Interval for Mean is (24.833 , 45.166 )

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