Exam 4: Test Scores and How to Use Them

Lisa's scores on tests for the assessment class are 93, 89, 87, and 83. She needs an 89.5 average to obtain an "A" in the class. Assuming that all tests, including the final, are equally weighted, what score must she obtain on the final exam to earn an "A"?

The two most important measures of dispersion are the __________ and the __________.

Discuss the relationship between the difficulty level of a test and the resulting distribution of scores.

It is impossible to have a percentile of either __________ or __________; the fiftieth percentile rank is the median.

If a test normed in 1990 was administered in 1992, the test norms would probably be considered to be

For norms to be representative, they should include

__________ hinges on whether the norm sample contains individuals with relevant characteristics and experiences and whether those characteristics and experiences are present in the sample in the same proportion as in the population of reference.

It is essential to test the full range of __________ ability in developing norms for intelligence tests.

Professor McDevey has finally achieved his lifelong goal of developing McDevey's Reading Achievement Test. As a publisher, you are concerned with the fact that the professor normed his instrument on youngsters living in a university town. Why might a university town not be representative of the U.S. population at large? What factors will you consider while critically evaluating this instrument?

A correlation coefficient can range between __________ and __________.

What are the advantages of using standard scores in the interpretation of test performance?

What are some reasons for using percentile ranks instead of standard scores to summarize data?

The sample should include the various kinds of people in the __________ as in the population.

Bands of percentiles that are 25 percentile ranks in width are __________.

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

Range, variance, and standard deviation are common measures of __________.

Standard scores are considered to be

The standard deviation, variance, and range are all measures of

Jacob's score on an achievement test is presented as an age equivalent of 7-3. What needs to be known before this score can be interpreted?

The kind of standard score that has a mean of 50 and a standard deviation of 10 is the __________. ​