PSY 291 EXAM 1 (FINAL) QUESTIONS WITH
CORRECT ANSWERS
5. What four pieces of information are basic for describing a set of data? - CORRECT ANSWER-✔✔✅#
of cases, shape, central tendency, variability
6. In a skewed frequency distribution, which type of representative value is furthest out in the tail? -
CORRECT ANSWER-✔✔✅Mean
7. Explain in your own words how statements such as "Group A has a higher income than Group B"
can be misleading. - CORRECT ANSWER-✔✔✅Because it is possible that some scores in Group B are
higher than Group A; there is always some overlap between the distributions, so you have to say on
average or typically
8. What is the shape of a distribution of Z scores? - CORRECT ANSWER-✔✔✅Same shape as the raw
score distribution
9. Some people refer to Table 1, Normal Curve Areas, as the "Z Table" or the "Z Score Table". Why is
this "Z" title incorrect? - CORRECT ANSWER-✔✔✅Because not all Z distributions are normal
distributions
10. In a normal distribution, what percent of scores are (a) below the mean (b) between one standard
deviation from the mean and two standard deviations from the mean (c) more than two standard
deviations above the mean and (d) between the mean and one standard deviation - CORRECT
ANSWER-✔✔✅a. 50
b. 14
c. 2
d. 34
11. ______ are usually inferred from the sample whereas _____ are calculated from data. - CORRECT
ANSWER-✔✔✅population parameters
sample statistics
CORRECT ANSWERS
5. What four pieces of information are basic for describing a set of data? - CORRECT ANSWER-✔✔✅#
of cases, shape, central tendency, variability
6. In a skewed frequency distribution, which type of representative value is furthest out in the tail? -
CORRECT ANSWER-✔✔✅Mean
7. Explain in your own words how statements such as "Group A has a higher income than Group B"
can be misleading. - CORRECT ANSWER-✔✔✅Because it is possible that some scores in Group B are
higher than Group A; there is always some overlap between the distributions, so you have to say on
average or typically
8. What is the shape of a distribution of Z scores? - CORRECT ANSWER-✔✔✅Same shape as the raw
score distribution
9. Some people refer to Table 1, Normal Curve Areas, as the "Z Table" or the "Z Score Table". Why is
this "Z" title incorrect? - CORRECT ANSWER-✔✔✅Because not all Z distributions are normal
distributions
10. In a normal distribution, what percent of scores are (a) below the mean (b) between one standard
deviation from the mean and two standard deviations from the mean (c) more than two standard
deviations above the mean and (d) between the mean and one standard deviation - CORRECT
ANSWER-✔✔✅a. 50
b. 14
c. 2
d. 34
11. ______ are usually inferred from the sample whereas _____ are calculated from data. - CORRECT
ANSWER-✔✔✅population parameters
sample statistics
