Failures of Electronic Equipment

Keywords: poisson regression, identity link, no intercept

Description

The data consist of failures of a piece of electronic equipment operating in two modes. For each operating period, Mode1 is the time spent operating in one mode and Mode2 is the time spent operating in the other. The total number of failures recorded in each period is recorded.


	Variable		Description

	Mode1		Time in operating mode 1
	Mode2		Time in operating mode 2
	Failures		Number of failures

Download

Data File (tab-delimited text)

Source

Jorgenson, D.W. (1961). Multiple regression analysis of a Poisson process. Journal of the American Statistical Association, 56, 235-245.

Analysis

This is an example of a Poisson regression problem with an identity link. One may also choose to remove the intercept, and to equate the error rates in the two modes. The first observation has an unexpectedly high number of failures for the operating times.