Statistics A Tool for Social Research 10th Edition by Joseph F. Healey – Test Bank

Statistics A Tool for Social Research 10th Edition by Joseph F. Healey – Test Bank

Chapter 4

1. Measures of dispersion indicate the degree to which a set of scores is
   1. heterogeneous.
   2. ambiguous.
   3. average.
   4. typical.

ANSWER: a

REFERENCES: 91

LEARNING OBJECTIVES: STAT.HEAL.15.04.01 – Explain the purpose of measures of dispersion and the information they convey.

1. Which of the following data sets shows the greatest variability? a. 9, 10, 11

b. 0, 5, 9

c. 50, 60, 170

d. 31, 33, 35

ANSWER: c

REFERENCES: 91

LEARNING OBJECTIVES: STAT.HEAL.15.04.01 – Explain the purpose of measures of dispersion and the information they convey.

1. Measures of dispersion provide information about the
   1. typical or most common score.
   2. variety within the distribution of scores.
   3. size of the sample.
   4. adequacy of the selection criteria for the sample.

ANSWER: b

REFERENCES: 92

LEARNING OBJECTIVES: STAT.HEAL.15.04.01 – Explain the purpose of measures of dispersion and the information they convey.

1. Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is
   1. contradictory.
   2. redundant.
   3. unnecessary.
   4. complementary.

ANSWER: d

REFERENCES: 92

LEARNING OBJECTIVES: STAT.HEAL.15.04.01 – Explain the purpose of measures of dispersion and the information they convey.

5.One problem with the range (R) as a measure of dispersion is that it

1. is very difficult to calculate.
2. ignores the most extreme scores.
3. can be used only for nominal-level variables.
4. is based on only the most extreme scores.

ANSWER: d

REFERENCES: 93

LEARNING OBJECTIVES: STAT.HEAL.15.04.02 – Compute and explain the range, the interquartile range, the standard deviation, and the variance.

1. An advantage of the interquartile range (Q) over the range (R) is that it
   1. can be used for nominal-level variables.
   2. includes the most extreme scores.
   3. is based on only the middle 50% of the scores.
   4. ignores the first and third quartiles.

ANSWER: c

REFERENCES: 93

LEARNING OBJECTIVES: STAT.HEAL.15.04.02 – Compute and explain the range, the interquartile range, the standard deviation, and the variance.

1. The second quartile (Q2) is equal in value to
   1. the mode.
   2. the median.
   3. the mean.
   4. the range.

ANSWER: b

REFERENCES: 93

LEARNING OBJECTIVES: STAT.HEAL.15.04.02 – Compute and explain the range, the interquartile range, the standard deviation, and the variance.

1. The interquartile range would be an appropriate measure of dispersion for
   1. nominal-level variables.
   2. continuous interval-ratio level variables only.
   3. ordinal level variables.
   4. discrete interval-ratio level variables only.

ANSWER: c

REFERENCES: 93

LEARNING OBJECTIVES: STAT.HEAL.15.04.02 – Compute and explain the range, the interquartile range, the standard deviation, and the variance.