In a survey, 20 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped shaped with a mean of $38 and standard deviation of $7. Constuct a...

In a survey,  20 people were asked how much they spent on their child's last birthday gift.  The results were roughly bell-shaped shaped with a mean of $38 and standard deviation of $7. Constuct a confidence interval at a 90% confidence level.  Remember this question is asking you to enter the point estimate plus or minus the margin of error.

Give your answers to one decimal place