Question 1

Which measure of dispersion is most important and most commonly used in social science research?

Accepted Answer

A)  the range
B)  the average deviation
C)  the median
D)  the standard deviationE) All of the above
F) B) and C)

Question 2

The lower limit for the standard deviation is 0;the upper limit is

Accepted Answer

A)  the score of the mean.
B)  the score of the median.
C)  a function of the number of cases.
D)  undefined;there is no upper limit.E) A) and B)
F) All of the above

Question 3

Which of the following is true? Since the 1960s,

Accepted Answer

A)  the distribution of income has become more heterogeneous.
B)  average income has fallen.
C)  median income increased until the 1990s and then fell.
D)  the distribution of income has become more homogeneousE) None of the above
F) A) and B)

Question 4

Four students have applied to a special program and only one can be accepted.They have taken a battery of 12 tests and all have exactly the same average score.The standard deviation of their test scores are: Student A = 3.12,Student B = 0.27,Student C = 13.45,Student D = 6.45.If consistency of performance is a criteria for acceptance,which of the four students should be selected?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and D)
F) B) and D)

Question 5

For the variable gender,which of the following should be used to measure dispersion?

Accepted Answer

A)  the index of qualitative variation
B)  the range
C)  the average deviation
D)  the varianceE) A) and B)
F) A) and D)

Question 6

The index of qualitative variation (IQV) varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

Accepted Answer

A)  0.25
B)  0.50
C)  0.75
D)  1.00E) A) and B)
F) A) and D)

Question 7

If a test score lies at the first quartile,it is

Accepted Answer

A)  higher than 25% of the scores.
B)  the same as the median.
C)  the same as the mode.
D)  higher than 75% of the scores.E) All of the above
F) A) and B)

Question 8

If a distribution of scores has a mean of 30 and a range of 0:

Accepted Answer

A)  the variance is 30
B)  the quartile deviation (Q) is 10
C)  there is no dispersion in the distribution
D)  the standard deviation is 1E) B) and D)
F) None of the above

Question 9

Which of the following data sets shows the greatest variability?

Accepted Answer

A)  9,10,11
B)  0,5,9
C)  50,60,170
D)  31,33,35E) C) and D)
F) A) and D)

Question 10

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Accepted Answer

A)  the standard deviation.
B)  the difference between the 20th and 80th percentiles.
C)  the range.
D)  the Interquartile range.E) All of the above
F) A) and B)

Question 11

Which of the following is a correct description of the distribution of income in the US since the 1960s?

Accepted Answer

A)  the mean income has risen but the median has fallen
B)  both the mean and the median have risen but the mean has increased more
C)  there is a noticeable negative skew in the distribution
D)  the distribution has grown less variableE) A) and B)
F) A) and C)

Question 12

The distances between the scores and the mean are called

Accepted Answer

A)  deviations.
B)  differences.
C)  ranges.
D)  summations.E) B) and C)
F) A) and B)

Question 13

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Accepted Answer

A)  is 10.
B)  is 100.
C)  is 1.
D)  can't be determined from this information.E) B) and C)
F) All of the above

Question 14

If the standard deviation of a group of scores is 0,

Accepted Answer

A)  the range would be at a maximum value.
B)  there is maximum variation in the scores.
C)  there is no variation in the scores.
D)  the mean is larger than the median.E) None of the above
F) B) and C)

Question 15

For the variable region of birth,which of the following should be used to measure dispersion?

Accepted Answer

A)  the index of qualitative variation
B)  the range
C)  the average deviation
D)  the varianceE) C) and D)
F) B) and C)

Question 16

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

Accepted Answer

A)  the mean.
B)  the range.
C)  the standard deviation.
D)  the percentile.E) B) and C)
F) A) and C)

Question 17

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

Accepted Answer

A)  is very difficult to calculate.
B)  ignores the most extreme scores.
C)  can be used only for nominal level variables.
D)  is based on only the most extreme scores.E) A) and B)
F) None of the above

Question 18

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

Accepted Answer

A)  contradictory.
B)  redundant.
C)  unnecessary.
D)  complementary.E) A) and C)
F) None of the above

Question 19

An advantage of the interquartile range (Q) over the range (R) is that it

Accepted Answer

A)  can be used for nominal level variables.
B)  includes the most extreme scores.
C)  is based on only the middle 50% of the scores.
D)  ignores the first and third quartiles.E) B) and C)
F) None of the above

Question 20

The interquartile range would be an appropriate measure of dispersion for

Accepted Answer

A)  nominal level variables.
B)  continuous interval-ratio level variables only.
C)  ordinal level variables.
D)  discrete interval-ratio level variables only.E) A) and C)
F) B) and C)

Exam 4: Measures of Dispersion

The distances between the scores and the mean are called

Correct Answer
verified

If the standard deviation of a group of scores is 0,

Correct Answer
verified

The index of qualitative variation (IQV) varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

Correct Answer
verified

Correct Answer
verified

The lower limit for the standard deviation is 0;the upper limit is

Correct Answer
verified

Which of the following is true? Since the 1960s,

Correct Answer
verified

Which of the following data sets shows the greatest variability?

Correct Answer
verified

Which of the following is a correct description of the distribution of income in the US since the 1960s?

Correct Answer
verified

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

Correct Answer
verified

For the variable region of birth,which of the following should be used to measure dispersion?

Correct Answer
verified

An advantage of the interquartile range (Q) over the range (R) is that it

Correct Answer
verified

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Correct Answer
verified

The interquartile range would be an appropriate measure of dispersion for

Correct Answer
verified

For the variable gender,which of the following should be used to measure dispersion?

Correct Answer
verified

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

Correct Answer
verified

Which measure of dispersion is most important and most commonly used in social science research?

Correct Answer
verified

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Correct Answer
verified

If a distribution of scores has a mean of 30 and a range of 0:

Correct Answer
verified

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

Correct Answer
verified

If a test score lies at the first quartile,it is

Correct Answer
verified

Exam 4: Measures of Dispersion

The distances between the scores and the mean are called

Correct AnswerverifiedShow Answer

If the standard deviation of a group of scores is 0,

Correct AnswerverifiedShow Answer

The index of qualitative variation (IQV) varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The lower limit for the standard deviation is 0;the upper limit is

Correct AnswerverifiedShow Answer

Which of the following is true? Since the 1960s,

Correct AnswerverifiedShow Answer

Which of the following data sets shows the greatest variability?

Correct AnswerverifiedShow Answer

Which of the following is a correct description of the distribution of income in the US since the 1960s?

Correct AnswerverifiedShow Answer

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

Correct AnswerverifiedShow Answer

For the variable region of birth,which of the following should be used to measure dispersion?

Correct AnswerverifiedShow Answer

An advantage of the interquartile range (Q) over the range (R) is that it

Correct AnswerverifiedShow Answer

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Correct AnswerverifiedShow Answer

The interquartile range would be an appropriate measure of dispersion for

Correct AnswerverifiedShow Answer

For the variable gender,which of the following should be used to measure dispersion?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which measure of dispersion is most important and most commonly used in social science research?

Correct AnswerverifiedShow Answer

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Correct AnswerverifiedShow Answer

If a distribution of scores has a mean of 30 and a range of 0:

Correct AnswerverifiedShow Answer

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

Correct AnswerverifiedShow Answer

If a test score lies at the first quartile,it is

Correct AnswerverifiedShow Answer

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