Question
A large utility company is considering two sites for locating a large scale wind energy conversion system (windmill). In selecting the site, both the average
A large utility company is considering two sites for locating a large scale wind energy conversion system (windmill). In selecting the site, both the average speed and variation in speed are important: the more consistent the winds speeds, the more efficient the energy conversion. The variability for the two sites is measured using a sample of 30 wind speed observations at each site. The summary data are given below:
Site 1 Site 2
Sample Size 30 30
Mean 12.2 mph 14.4 mph
Sample std. deviation 1.8 mph 2.62 mph
At the 10% level of significance, test whether the variability in wind speeds at the two sites is the same.
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