# A survey of several 10 to 11 year olds recorded the following amounts spent on a trip to the mall:\$19.17,\$21.18,\$20.38,\$25.08Constructrhe 90% confidence interval for the average amount spent by 10 to 11 year olds on a trip to the mall. Assume the population is approximately normal.1.Calculate the standard deviation Round to two decimal places.2.find critical value, round to 3 decimals3. Construct the 90% confidence interval. Round 2 decimal places. The lower and upper endpoints.

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A survey of several 10 to 11 year olds recorded the following amounts spent on a trip to the mall:

\$19.17,\$21.18,\$20.38,\$25.08

Constructrhe 90% confidence interval for the average amount spent by 10 to 11 year olds on a trip to the mall. Assume the population is approximately normal.

1.Calculate the standard deviation Round to two decimal places.

2.find critical value, round to 3 decimals

3. Construct the 90% confidence interval. Round 2 decimal places. The lower and upper endpoints.

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Step 1

In this question we have data and using that data we have to find the standard deviation and confidence interval.

Step 2

Here we have calculated the mean and standard deviatio...

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### Hypothesis Testing 