By using random samples, polling organizations can represent the view of the American public with a sample size starting from _____

The brain uses parallel processing for ____, while sequential processing is used for ____.

A. solving new problems; routine business B. consciousness; unconsciousness C. routine business; solving new problems D. new problems; old problems

Nonparametric tests are used to find significant differences between groups, however these tests

A) do not estimate population characteristics B) are less reliable than parametric tests C) are rarely used in psychological research D) must be validated prior to their use