around 30. This indicates that the reaction times in all groupings were quite closely related. As
for Experiment 1 this was not the case.
Even though the mean reaction times were close the
standard deviations were elevated.
This shows us that the reaction times of members were much
more diverse.
Chapter 3
14. On a standard measure of hearing ability, the mean is 300 and the standard deviation

INDIVIDUAL ASSIGNMENT WEEK 3
7
is 20. Give the Z scores for persons who score (a) 340, (b) 310, and(c) 260. Give the raw scores for persons whose Z scores on this test are (d) 2.4,(e) 1.5, (f) 0, and (g) (Aron, A. A. Aron. E. N. & Coups. E. J., 2009).Z = (X - M) ÷ SD
15. A person scores 81 on a test of verbal ability and 6.4 on a test of quantitativeability. For the verbal ability test, the mean for people in general is 50 and thestandard deviation is 20. For the quantitative ability test, the mean for people ingeneral is 0 and 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 acourse in statistics (Aron, A. A. Aron. E. N. & Coups. E. J., 2009).