Technicians measure heat flux as part of a solar thermal energy test. An energy engineer wants to determine how heat flux is predicted by the position of the east, south, and north focal points.

The engineer fits the regression model and uses it to calculate a range of likely values for future observations at specified settings.

- Open the sample data, ThermalEnergyTest.MTW.
- Choose .
- From Response, select Heat Flux.
- In the table, enter
`35`for East,`34`for South, and`16`for North. - Click OK.

Minitab uses the stored model to calculate that the predicted strength is 258.242. The prediction interval indicates that the technicians can be 95% confident that a single future value will fall within the range of 239.882 to 276.601.

Regression Equation
Heat Flux = 389.2 + 2.12 East + 5.318 South - 24.13 North

Settings
Variable Setting
East 35
South 34
North 16

Prediction
Fit SE Fit 95% CI 95% PI
258.242 2.35414 (253.393, 263.090) (239.882, 276.601)