Many teens engage in sex to boost social status and to gain acceptance

The criterion determines

a. the critical value of the sample mean. b. the probability of the sample mean. c. the standard deviation (standard error) of the sampling distribution of means. d. the size of the region of rejection.

In an experiment, researchers exposed half the children to 2 hours of violence on television every day for a month and made sure the other half saw no violence on television at all. At the end of the month, they measured the level of aggressiveness in the children. What were the children who were NOT exposed to any violence on television?

A) the dependent variable B) the independent variable C) the control group D) the experimental group