Confidence interval estimates for the mean

Reference no: EM13319884

The Highway Safety Department wants to study the driving habits of individuals. A sample of 100 cars traveling on the highway revealed an average speed of 60 miles per hour with a standard deviation of 11 miles per hour.

A. Construct a 95% and 80% confidence interval estimates for the mean an Discuss why the 80% and 95% confidence intervals are different.

Reference no: EM13319884

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