Question

A survey of several 11 to 13 year olds recorded the following amounts spent on a...

A survey of several 11 to 13 year olds recorded the following amounts spent on a trip to the mall:

$28.51,$25.01,$29.61,$30.31,$24.12,$27.49

Construct the 95% confidence interval for the average amount spent by 11 to 13 year olds on a trip to the mall. Assume the population is approximately normal.

Step 1 of 4 :  

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

Math   Statistics-And-Probability   
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Homework Answers

Answer #1
Values ( X )
28.51 1.0034
25.01 6.2415
29.61 4.4171
30.31 7.8495
24.12 11.4806
27.49 0.0003
Total 165.05 30.9924

Mean


Standard deviation

Confidence Interval



Lower Limit =
Lower Limit = 24.8955
Upper Limit =
Upper Limit = 30.1211
95% Confidence interval is ( 24.8955 , 30.1211 )


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