Windmill data (Data file: wm2) In Problem 2.21 we considered data to predict wind speed CSpd at a candidate site based on wind speed RSpd at a nearby reference site where long-term data are available....

Windmill data (Data file: wm2) In Problem 2.21 we considered data to predict wind speed CSpd at a candidate site based on wind speed RSpd at a nearby reference site where long-term data are available. In addition to RSpd, we also have available the wind direction, RDir, measured in degrees. A standard method to include the direction data in the prediction is to divide the directions into several bins and then fit a separate mean function for CSpd on RSpd in each bin. In the wind farm literature, this is called the measure, correlate, predict method (Derrick, 1992). The data file contains values of CSpd, RSpd, RDir, and Bin for 2002 for the same candidate and reference sites considered in Sixteen bins are used, the first bin for cases with RDir between 0 and 22.5 degrees, the second for cases with RDir between 22.5 and 45 degrees, . . . , and the last bin between

337.5 and 360 degrees. Both the number of bins and their starting points are arbitrary.