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  3. . the average wind speed in casper, wy, has been f

. The average wind speed in Casper, WY, has been found to be 12.7 mph, and...

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Basic Math

. The average wind speed in Casper,WY, has been found to be 12.7 mph, and in Phoenix, AZ, it is 6.2mph. To test the relationship between the averages, the averagewind speed was calculated for a sample of 31 days for each city.The results are reported below. (15 pts)

Casper

Phoenix

Sample size    n

31

31

Sample mean    x?

12.85 mph

7.9 mph

Population standard deviation    ?

3.3 mph

2.8 mph

Is there sufficient evidence at ? = 0.05 to conclude that theaverage wind speed is greater in Casper than in Phoenix? Completethe hypotheses H1, a summary of your answer, and drawthe normal curve.

H0: ?1 =?2                       ? =0.05          C.V. = ________

H1: ?1   ?2 (claim)

Answer & Explanation Solved by verified expert
4.2 Ratings (783 Votes)
1 Null and alternative HypothesisH0 The average    See Answer
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