A researcher claims that the average wind speed in a certain city is 8 miles per hour. A sample of 32 days has an average wind speed of 8.2 miles per hour. The standard deviation of the population is 0.6 mile per hour. At α=0.05, find the critical value for the hypothesis testing. A. 1.65        B.  + 1.96                   C. -1.65 D. + 2.58

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A researcher claims that the average wind speed in a certain city is 8 miles per hour. A sample of 32 days has an average wind speed of 8.2 miles per hour. The standard deviation of the population is 0.6 mile per hour. At α=0.05, find the critical value for the hypothesis testing.

A. 1.65       

B.  + 1.96                  

C. -1.65

D. + 2.58

 

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