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 9.9 miles per hour. At =α0.10, is the driver correct? Assume the variable is normally distributed. State the hypotheses and identify the claim with the correct hypothesis.  H0:   H1: Claim or Not a Claim? This Hypothesis test is one-tailed or two-tailed? What is the Critical Value?

A First Course in Probability (10th Edition)
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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 9.9 miles per hour. At =α0.10, is the driver correct? Assume the variable is normally distributed.
State the hypotheses and identify the claim with the correct hypothesis.  H0:   H1:
Claim or Not a Claim?
This Hypothesis test is one-tailed or two-tailed?
What is the Critical Value?
Expert Solution
Step 1: Provide the given information

Assume that σ is the population standard deviation of the speeds of the 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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