Technicians measure heat flux as part of a solar thermal energy test. An energy engineer wants to determine how total heat flux is predicted by other variables: insolation, the position of the east, south, and north focal points, and the time of day.
You can use this data to demonstrate Best Subsets Regression.
|Worksheet column||Description||Variable type|
|Heat Flux||The total heat flux, in kwatts||Response|
|Insolation||The insolation value, in watts/m2||Predictor|
|East||The position of the focal point in the east direction, in inches||Predictor|
|South||The position of the focal point in the south direction, in inches||Predictor|
|North||The position of the focal point in the north direction, in inches||Predictor|
|Time of Day||The time of day that the data were collected||Predictor|
Data are from D.C. Montgomery, E.A. Peck, and G.G. Vining (2012). Introduction to Linear Regression Analysis. John Wiley & Sons.