No meaningful interpretation can be attached to the original or raw scores obtained on a test unless which of the following is/are known?
A) Mean
B) Standard deviation
C) Shape of the distribution
D) All of the above

Question

Quizplus · Accepted Answer

Mean, standard deviation, and shape of the distribution are essential pieces of information that enable us to interpret the original or raw scores obtained on a test. Knowing the mean and standard deviation helps to understand the average score and the spread of scores, respectively. The shape of the distribution provides information about the frequency with which scores occur. Therefore, all of the above must be known for a meaningful interpretation of raw scores.

No Meaningful Interpretation Can Be Attached to the Original or Raw