In a survey, 26 people were asked how much money they spent on their child's last...

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In a survey, 26 people were asked how much money they spent on their child's last...

In a survey, 26 people were asked how much money they spent on their child's last birthday gift. The results were roughly bell shaped with a mean of $37 and standard deviation of $20. Construct a confidence interval at 90% confidence level.

How would ido this on my ti84 graphing calculator? I am doing zinterval and getting the wrong answer.

math Statistics-And-Probability

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In a survey, 26 people were asked how much they spent on their child's last birthday...

In a survey, 32 people were asked how much they spent on their child's last birthday...

1. In a survey, 32 people were asked how much they spent on their child's last...

In a survey, 30 people were asked how much they spent on their child's last birthday...

In a survey, 29 people were asked how much they spent on their child's last birthday...

In a survey, 39 people were asked how much they spent on their child's last birthday...

In a survey, 25 people were asked how much they spent on their child's last birthday...

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

In a survey, 21 people were asked how much they spent on their child's last birthday...

In a survey, 27 people were asked how much they spent on their child's last birthday...

In a survey, 26 people were asked how much money they spent on their child's last...

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