Exam 19: Appendix A: Behavioral Statistics

Often, two correlated measures are related as a result of the influence of a third variable.

The college admissions office has determined that the correlation between IQ scores and college grade point average is .50.This means that _____ percent of the variation in college grades is accounted for by knowing IQ scores.

The relationship between anxiety level and classroom test scores would probably

Of the numbers 10, 16, 3, 7, and 17, the range is 14.

The _____ is a number that tells how many standard deviations above or below the mean a score is.

A small, randomly-selected part of a larger population that accurately reflects characteristics of the whole population is a _____ sample.

A correlation of +1.00 or -1.00 means that 100 percent of the variation in the Y measure is accounted for by knowing the X measure.

If the correlation between anxiety and test scores is -.85, then we can safely conclude that

When using tests of statistical significance, the _____ gives the odds that the observed difference was due to chance.

The fewer absences that students have, the higher their grade point average.This illustrates a positive relationship.

The most commonly used correlation coefficient is called the

Histograms and frequency polygons are visual representations of

Regarding correlation coefficients, which of the following statements is FALSE?

Graphical statistics fall into the category of

An effective way to make sure that a sample is representative is to use random selection.

If there is a .75 correlation between the hours that students devote to studying and their grades, _____ between these two measures.

For the numbers 10, 19, 2, 9, and 15, the range is

When measure X gets larger, measure Y also gets larger in a

Of the standard deviations listed, the largest percentage of scores would fall between _____ SD on a normal curve.

To obtain the _____ of a group of scores, one must find the difference of each score from the mean, square each difference, find the average of this total, and, lastly, take the square root of this average.