=+been programmed into all of the most popular statistical computer packages. When using any particular package, it is necessary only to enter the data, make an appropriate request, and know how to find the estimates on the output. The estimated regression equation yn 5 a 1 b1x1 1 … 1 bk xk can then be used to estimate a mean y value or predict a single y value.

in mean life associated with an increase of 1 in load?