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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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Jbev757 Jbev757
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6 years ago
The Highway Safety Department wants to study the driving habits of individuals. A sample of 81 cars traveling on the highway revealed an average speed of 67 miles per hour with a standard deviation of 9 miles per hour.
 a. Compute the standard error of the mean.
  b. Determine a 99 confidence interval estimate for the speed of all cars.
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DCAV1DCAV1
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6 years ago
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Jbev757 Author
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6 years ago
You make an excellent tutor!
Brownr40
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Yesterday
Just got PERFECT on my quiz
bkrandy
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2 hours ago
Brilliant ツ
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