
Analyzing Software Measurement Data ◾ 285
EXERCISES
1. Why are statistics necessary? Why can experimenters not just
look at the data and decide for themselves what is important? On
the other hand, which of the following is more important: (a) the
results of a statistical test or (b) the results of the intraocular sig-
nicance test (i.e., when the eect leaps out and hits you between
the eyes)?
2. Can a comparison that does not achieve statistical signicance still
be important?
3. ree years ago, the soware development manager introduced
changes to the development practices at your company. ese
changes were supposed to ensure that more ...