Chapter 3:14. On a standard measure of hearing ability, the mean is 300 & the standard deviation is 20. Give the Z scores for persons who score (a) 340, (b) 310, & (c) 260. Give the raw scores for persons whose Z scores on this test are (d) 2.4, (e) 1.5, (f) 0, & (g)-4.5.
The X score can be calculated from Z score as X = Z+µZX = Z+µ2.43481.533003004.539015. A person scores 81 on a test of verbal ability & 6.4 on a test of quantitative ability. For the verbal ability test, the mean for people in general is 50 & the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 & the standard deviation is 5. Which is this person’s stronger ability: verbal or quantitative? Explain your answer to a person who has never had a course in statistics.22. Suppose you want to conduct a survey of the attitude of psychology graduate students studying clinical psychology toward psychoanalytic methods of psychotherapy. One approach would be to contact every psychology graduate student you know & ask
them to fill out a questionnaire about it. (a) What kind of sampling method is this? (b) What is a major limitation of this kind of approach?25. You are conducting a survey at a college with 800 students, 50 faculty members, & 150 administrators. Each of these 1,000 individuals has a single listing in the campus phone directory. Suppose you were to cut up the directory & pull out one listing at