Exam 7: Statistical Concepts: Creating New Scores to Interpret Test Data

An individual receives a DIQ score of 73. Taking into account standard error of measurement (SEM), what is his "true score" 95 percent of the time if test-retest reliability is .96?

Match the standard score with its mean and standard deviation. -Sten score

In norm referencing, test scores are compared to a group of individuals called the norm group or peer group.

An individual being tested for a gifted program scores a 132 on the Cognitive Ability Test (CogAT), which has a mean of 100 and a standard deviation of 16. There is a .40 correlation between the CogAT score and success as measured by GPA in the gifted program, which has a weighted mean of 4.3 with a SD of .2. Use the Standard Error of the Estimate (SE_est) to predict where this students GPA will fall 95 percent of the time.

An individual receives a T score of 73 on a test that measures empathic ability. Taking into account standard error of measurement (SEM), what is his "true score" 68 percent of the time if test-retest reliability is .75?

Which scale of measurement is being used when comparing achievement test scores of different school systems?

Match the standard score with its mean and standard deviation. -T score

Fill in the blanks for the information listed below. Please note that the publisher uses the same mean and standard deviation for the three types of tests. For grade equivalent, simply state if Charlie Brown scored at his grade equivalent, or higher or lower than his grade equivalent. (Given: publisher mean = 120). Name of Student: Charlie Brown Date of Birth: 1/8/80 Grade: 10.1

On a normally distributed curve, raw scores may become meaningful if you know the standard deviation and mean of the group.

Which of the following is NOT true?

Match the type of scale with the definition. -Ratio scale

Though the common usages of DIQs, percentiles, stanines, T-scores, and Grade Equivalents may imply a different type of test, they all measure the relative position of an individual as compared to the norm group.

Assume a normal curve and that the mean of the raw scores is 8, the standard deviation is 2.65, and the test-retest reliability is .84. If an individual who is in grade 5.6 received a score of 10, answer the following questions: - What is the individual's approximate percentile?

An individual receives a DIQ score of 73. Taking into account standard error of measurement (SEM), what is his "true score" 68 percent of the time if test-retest reliability is .96?

The area between +1 and −1 standard deviations on a normal curve would include approximately 84 percent of the population.

Using z-scores gives an individual the potential of comparing test scores on different types of tests.

If a child is in grade 4.3 and receives a grade equivalent of 7.2 on an achievement test, he or she is achieving at the 7.2 grade level.

A standard deviation of 2 is a percentile rank of about 98.

In order to evaluate a graduate program in psychology, a decision is made to compare the scores of the recent graduates on the national licensure exam to scores nationally. The internal consistency reliability of the test = .84. The program therefore follows up with their students and finds 24 students who have taken the exam in its most recent form. The scores of the students in the program are as follows: Given information: Mean = 144; Median = 142; Mode = 142; Range = 50 -A graduate psychology student has a 3.65 GPA, where the psychology program's mean is 3.6 and SD is .1. Faculty have found a .60 correlation between students' GPA and their national licensure exam publisher score (M = 150, SD = 20). Knowing our students GPA, we could predict her score to fall in what range on the national licensure exam 68 percent of the time?

In order to evaluate a graduate program in psychology, a decision is made to compare the scores of the recent graduates on the national licensure exam to scores nationally. The internal consistency reliability of the test = .84. The program therefore follows up with their students and finds 24 students who have taken the exam in its most recent form. The scores of the students in the program are as follows: Given information: Mean = 144; Median = 142; Mode = 142; Range = 50 -Find the standard deviation of the students in the graduate program.