Assume a Normal Curve and That the Mean of the Raw

Short Answer

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:

-Scores with this instrument correlate .50 with 6^th grade GPA. If the 6^th grade GPA has a mean of 3.0 and a SD of .3, predict the GPA range this students grades will fall 68 percent of the time.