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Show work The Highway Safety Department wants to study the driving habits of individuals. A sample of 121 cars traveling on the highway revealed an

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The Highway Safety Department wants to study the driving habits of individuals. A sample of 121 cars traveling on the highway revealed an average speed of 60 miles per hour with a standard deviation of 11 miles per hour. a) Determine a 99% confidence interval estimate for the speed of all cars. (SHOW. WORK; 6 pts) b) Interpret the confidence interval calculated in part a). (SHOW WORK; 2 pts)

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