I agree that reducing variables is helpful for interpreting results.
2.
The reduced variables are defined in terms of critical variables.
3.
Among the ideas : bundling several items into higher-priced " packages, " targeting specific groups of customers more effectively, reducing variable costs to lower the break-even point.
4.
The use of a nonverbal, nonthreatening task to evaluate intelligence is intended to eliminate possible sources of bias by reducing variables like primary language, verbal skills, communication disabilities, and sensitivity to working under pressure.