A common reason is the omission of relevant explanatory variables, or dependent observations.

This would have assured that the move would change only the constitutionally relevant variables.

Happiness, possibly the most relevant variable for a study of inequality, is also the hardest to measure.

For example, suppose Gender is one of the qualitative variables relevant to a regression.

The strategy is innate, though the program must include steps for measuring the relevant variables when necessary.

Figure 8.4 shows some of the relevant variables and feedback in a system dynamics flowchart.

The relevant explanatory variables are listed in Table 5.1.

The issues over which strikes are fought also fall into the category of relevant political variables.

New technology and higher standards mean increased costs, but the first thing to do is to look at all the relevant variables.

"With some other teams, it was important to have a personal meeting in order to have a full discussion of all relevant variables."