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 $43 and standard deviation of $11. 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,

, was betweendollars anddollars.

The sample statistic isdollars.

The margin of error isdollars.

The confidence interval can be written as

dollars

dollars.