Assuming that the raw scores are distributed normally,which one of the following standard scores indicates the best performance relative to the group being tested?
A)Percentile rank of 60
B)Stanine score of 8
C)T-score of 59
D)z-score of +.76

Question

Quizplus · Accepted Answer

A stanine score of 8 is considered to indicate above-average performance, placing an individual in the top 4% of the population. In comparison, a percentile rank of 60 indicates that the individual performed better than 60% of the population, a T-score of 59 only indicates a performance better than around 79% of the population, and a z-score of +.76 only indicates a performance better than around 78% of the population. Therefore, the stanine score of 8 is the best indicator of high performance relative to the group being tested.

Assuming That the Raw Scores Are Distributed Normally,which One of the Following