Three experimental conditions are to be compared in a within-subjects experiment. Each condition requires 15 minutes, and a total of one hour is available for testing each subject. Which of the following procedures can be used to control for order and sequence effects?

Which of the following statements regarding physical activity during adolescence is FALSE?

A) Minority female teens engage in physical activity less compared to Caucasians. B) Teens report that they would exercise regularly if they have a friend to exercise with. C) Teens whose parents support regular physical activity are more active. D) Teens whose neighborhoods are perceived as being less safe are highly physically active.

The inflection point in the normal curve is _____________ from the mean

a. less one standard deviation b. two standard deviations c. three standard deviations d. one standard deviation