The average wind speed in Casper, WY, has been found to be 12.7 mph, and in Phoenix, AZ, it is 6.2 mph. To test the relationship between the averages, the average wind 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 the average wind speed is greater in Casper than in Phoenix? Complete the hypotheses H_1,a summary of your answer, and draw the normal curve.

H₀: ?₁ = ?₂ ? = 0.05 C.V. = ________

H₁: ?₁ ?₂ (claim)

Supply correct symbol above.

ScholarMatic: Explanation & Answer

Your ready answer from a verified tutor is just a click away for as little as $14.99

---

  

Click Order Now to get 100% Original Answer Customized to your instructions!