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A survey of several 9 to 11 year olds recorded the following amounts spent on a...

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Basic Math

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.

Answer & Explanation Solved by verified expert
4.4 Ratings (781 Votes)
Step 1 of 4 Calculate the sample mean for the given sampledataAns 1956CalculationSample mean 20702082 1232 1953 24435    See Answer
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