Exam 19: Appendix A: Behavioral Statistics

Wendy has determined that the correlation between her reading screening test and her students' reading grades is .30.What percent of the variation in reading scores is Accounted for by knowing the students' scores on the screening test?

When the scores are close together,the number representing this variability will be

Graphical statistics fall into the category of

Measures of central tendency

The political science class randomly selected 150 adults from the community in order to obtain their opinions on the upcoming presidential race.This group of 150 people would be considered the

Regarding two variables of interest,a correlation will tell us only the degree of

A mathematical relationship in which increases in one measure are matched by decreases in the other is a

The Reeds have five children aged 2,6,9,11,and 14.The median age of the Reed children is

The difference between the highest and lowest scores is known as the

Which of the following is a graph of a frequency distribution in which the number of scores falling in each class is represented by points on a line?

How much must two means differ before we can consider the difference "real" and not due to chance? To answer this question,we must use

Zack had a score of 90 in a class with a mean of 80 and a standard deviation of 10.His z-score is

If one wants to find the median of an even number of scores,one

Which of the following correlations is depicted below?

Given these scores 22,44,33,55,33,22,44,22,55,22,the mode is

Which of following represents the point in a group of scores where half the values of the group of scores fall below the median and half fall above?

For his study,Dr.Tabor has chosen the most commonly used correlation coefficient, which is the

For his research study,Dr.Safar wants to make sure that his sample is a representative one.The most effective way for him to do this is to

Which of the following is NOT an example of the use of graphical statistics?

Regarding correlations,which of the following statements is FALSE?