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A study on highway safety studied the driving habits of individuals. A sample of 78 cars...

A study on highway safety studied the driving habits of individuals. A sample of 78 cars travelling on the highway revealed an average speed of 98.7 kph with a standard deviation of 22.7 kph. Determine the 95% confidence interval for the mean speed of all cars (kph), if it is known that speed is normally distributed. Give the upper limit only (in kph) correct to three decimal places.

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Rahul Sunny answered 1 year ago
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