Suppose that a college freshman earned 125 raw score points on a vocabulary test where the normative sample averaged 100 points with SD of 15 points). Suppose, in addition, he earned 110 raw score points on a spatial thinking test where the normative sample averaged 90 points with SD of 20 points). In which skill area does he show greater aptitude, vocabulary or spatial thinking?
A) vocabulary
B) spatial thinking
C) aptitude is equal in the two areas
D) insufficient data to answer the question

Question

Quizplus · Accepted Answer

The student's z-score for vocabulary is (125-100)/15 = 1.67, and for spatial thinking is (110-90)/20 = 1.00. A higher z-score indicates greater aptitude, so the student shows greater aptitude in vocabulary.

Suppose That a College Freshman Earned 125 Raw Score Points