You have data from 25 people (N = 25) on two variables:

1) Self-restraintmeasured at age 10: Those who score high on this measure have a lot of self-restraint and think about things before doing them. It is a continuous variable. It is measured in the following way: a plate of cookies was placed before each kid by an experimenter who told the kid not to take a cookie until "he/she really wanted it". The experimenter then left the room and the score for each kid is the number of minutes that passed before a kid grabbed a cookie - those who took less time have less self-restraint.

and

2)Number of delinquent actscommitted between the ages of 10 and 17.

Here is your data:

Use thethis formula(Links to an external site.)to calculate Pearson's r correlation coefficient.

HINT: You may find it helpful to downloadthis worksheetto help you keep track of the arithmetic involved. The first row is filled in for you.

r = (Bank Answers choose!)(-0.745)(-0.932)(0.079)(0.863)

r2= (Bank Answers choose!)(0.31)(0.56)(0.89)(0.01), which means that (Bank Answers 31%, 56%, 89%, 1%)________of the variance innumber of delinquent acts is explained bysomeone's self-restraint score.