A survey of several 11 to 12 year olds recorded the following amounts spent on a trip to the mall: $19.55,$25.44,$25.80,$14.87,$11.83,$19.89 Construct the 80% confidence interval for the average amount spent by 11 to 12 year olds on a trip to the mall. Assume the population is approximately normal. Copy Data Step 2 of 4 :  Calculate the sample standard deviation for the given sample data. Round your answer to two decimal places.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A survey of several 11 to 12 year olds recorded the following amounts spent on a trip to the mall:

$19.55,$25.44,$25.80,$14.87,$11.83,$19.89

Construct the 80% confidence interval for the average amount spent by 11 to 12 year olds on a trip to the mall. Assume the population is approximately normal.

Copy Data

Step 2 of 4 : 

Calculate the sample standard deviation for the given sample data. Round your answer to two decimal places.

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