A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Interstate Speeds It has been reported that the standard deviation of the speeds of drivers on Interstate 75 near Findlay, Ohio, is 8 miles per hour for all vehicles. A driver feels from experience that this is very low. A survey is conducted, and for 29 drivers the standard deviation is 9.1 miles per hour. At =α0.05, is the driver correct? Assume the variable is normally di)Find the critical value(s). Round the answers to three decimal places, if necessary. If there is more than one critical value, separate them with commas. Compute the test value. Round the answer to 3 decimal places. X2=
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Step 1: Provide the given information
Suppose σ is the population standard deviation of the speeds of drivers.
A driver feels from experience that the population standard deviation of the speeds of drivers of 8 miles per hour is very low.
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