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Note: Some problems require the normal curve table, which can

Question : Note: Some problems require the normal curve table, which can : 1991694

Note: Some problems require the normal curve table, which can be copied from the textbook's Appendix (Table A–1).

1)In a distribution of Z scores, the mean is always

A)10

B)1

C)0

D)50

2)The variance of a distribution of Z scores is always

A)ΣZ / N

B)(Z) (M + SD)

C)0

D)1

3)A psychologist is most likely to calculate Z scores in order to

A)compare scores obtained from two different scales.

B)compare the skew of two different distributions.

C)determine how far above or below the median a score is.

D)determine the shape of a distribution of scores.

4)Which of the following statements regarding Z scores is FALSE?

A)It indicates whether the raw score is above or below average.

B)It indicates whether or not a distribution is skewed.

C)It indicates the percentage of cases between that score and the mean.

D)It is sometimes referred to as a standard score.

5)The raw score that corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard deviation of 10 is

A)82

B)90

C)100

D)170

6)If the mean of a test is 13 and its standard deviation is 3, the Z score for a person with a raw score of 7 is

A)–2

B)–1

C)1

D)2

7)The normal curve is most likely to be described as

A)bimodal and roughly symmetrical.

B)unimodal, roughly symmetrical, and bell-shaped.

C)skewed to the right.

D)a roughly symmetrical U-shape.

The questions below (# 8 – 10) are based on the following scenario.

Molly wants to pursue a graduate degree at New University but is unsure whether to specialize in law or medicine. To help her decide, she takes the MCAT and LSAT exams.

LSAT: Molly's score = 120; Students at New University: M = 150, SD = 15

MCAT: Molly's score = 52; Students at New University: M = 40, SD = 6

8)Molly's Z scores were:

A)LSAT, Z = 2.00; MCAT Z = 2.00

B)LSAT, Z = 2.00; MCAT Z = –2.00

C)LSAT, Z = –2.00; MCAT Z = 2.00

D)LSAT, Z = –2.00; MCAT Z = –2.00

9)In relation to the other people at New University, on which test did Molly get the better score?

A)the LSAT

B)the MCAT

C)the scores were equal

D)it is impossible to say without more information

10)Using the percentage approximations for the normal curve, the percentage of people having a lower score than Molly on the LSAT would be:

A)2%

B)14%

C)48%

D


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