A survey of several 9 to 11 year olds recorded the followingamounts spent on a trip to the mall: $20.70, $20.82, $12.32,$19.53, $24.43
Construct the 98% confidence interval for the average amountspent by 9 to 11 year olds on a trip to the mall. Assume thepopulation is approximately normal.
Step 1 of 4: Calculate the sample mean for the given sampledata. Round your answer to two decimal places.
Step 2 of 4: Calculate the sample standard deviation for thegiven sample data. Round your answer to two decimal places.
Step 3 of 4: Find the critical value that should be used inconstructing the confidence interval. Round your answer to threedecimal places.
Step 4 of 4: Construct the 98% confidence interval. Round youranswer to two decimal places.
