Exam 4: Test Scores and How to Use Them

In a normal distribution, approximately __________ of the cases (or scores) occur between one standard deviation and two standard deviations either above or below the mean.

A developmental score that indicates a student's raw score in terms of the average performance of individuals of a certain age in the norm group is a(n) __________.

One factor that needs to be considered in determining the number of subjects to include in a norm sample is that the sample needs to be large enough to

Johnny, age six years, earns an age equivalent of 7-2 on an intelligence test. The appropriate statement to make based on this information is that

A z score is equal to a(n)

Of the following correlation coefficients, the one with the poorest predictive value is

When we talk about platykurtic curves and leptokurtic curves, we are talking about

When an age equivalent is going to be derived from a target score that is outside the available norm-group scores, the age equivalent for the target score is estimated through

The sixtieth percentile is the point in a distribution

The Granite School District examined the standardized achievement data for its students and found that the correlation between reading scores and math scores during the most recent year was -.99. They concluded that they had a nearly perfect correlation, indicating that if a student achieved a high score in reading, the same student would achieve a high score in math. Have they reached an appropriate conclusion? Why or why not?