An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 90 days in each region. The mean wind speed in Region A is 13.9 miles per hour. Assume the population standard deviation is 2.9 miles per hour. The mean wind speed in Region B is 15.3 miles per hour. Assume the population standard deviation is 3.1 miles per hour. At a = 0.05, can the company support the researcher's claim? Complete parts (a) through (d) below. u y yvu u u U M H eV . O B. The wind speed in Region A is not less than the wind speed in Region B. OC. The wind speed in Region A is the same as the wind speed in Region B. D. The wind speed in Region A is less than the wind speed in Region B. Let Region A be sample 1 and let Region B be sample 2. Identify Ho and Ha- (b) Find the critical value(s) and identify the rejection region. The critical value(s) is/are z, = (Round to two decimal places as needed. Use a comma to separate answers as needed.)

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An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A
is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 90 days in each region. The mean wind speed in Region A is
13.9 miles per hour. Assume the population standard deviation is 2.9 miles per hour. The mean wind speed in Region B is 15.3 miles per hour. Assume the
population standard deviation is 3.1 miles per hour. At a = 0.05, can the company support the researcher's claim? Complete parts (a) through (d) below.
O B. The wind speed in Region A is not less than the wind speed in Region B.
O C. The wind speed in Region A is the same as the wind speed in Region B
D. The wind speed in Region A is less than the wind speed in Region B.
Let Region A be sample 1 and let Region B be sample 2. Identify Ho and Ha
Ho: H1 2 H2
Hai H1 < H2
(b) Find the critical value(s) and identify the rejection region.
The critical value(s) is/are z, =
(Round to two decimal places as needed. Use a comma to separate answers as needed.)
Transcribed Image Text:An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 90 days in each region. The mean wind speed in Region A is 13.9 miles per hour. Assume the population standard deviation is 2.9 miles per hour. The mean wind speed in Region B is 15.3 miles per hour. Assume the population standard deviation is 3.1 miles per hour. At a = 0.05, can the company support the researcher's claim? Complete parts (a) through (d) below. O B. The wind speed in Region A is not less than the wind speed in Region B. O C. The wind speed in Region A is the same as the wind speed in Region B D. The wind speed in Region A is less than the wind speed in Region B. Let Region A be sample 1 and let Region B be sample 2. Identify Ho and Ha Ho: H1 2 H2 Hai H1 < H2 (b) Find the critical value(s) and identify the rejection region. The critical value(s) is/are z, = (Round to two decimal places as needed. Use a comma to separate answers as needed.)
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