Question Details

41. When developing a frequency distribution the class (group), intervals should be _____

A. large.

B. small.

C. integer.

D. mutually exclusive.

E. equal.

42. When using the Chebyshev's theorem to obtain the bounds for a 99.73 percent of the values in a

population, the interval generally will be ___________ the interval obtained for the same percentage if

normal distribution is assumed (empirical rule).

A. Shorter than

B. Wider than

C. The same as

43. Which of the following graphical tools is not used to study the shapes of distributions?

A. Stem-and-Leaf display

B. Scatter plot

C. Histogram

D. Dot plot

E. Cumulative frequency distribution

44. Score x would be considered an outlier if:

A. x = 15, mean = 20, standard deviation = 3

B. x = 15, mean = 50, standard deviation = 30

C. x = 15, mean = 25, standard deviation = 5

D. x = 15, mean = 10, standard deviation = 100

E. x = 15, mean = 50, standard deviation = 10

45. A quantity that measures the variation of a population or a sample relative to its mean is called the

____.

A. Range

B. Standard deviation

C. Coefficient of variation

D. Variance

E. Interquartile range

46. As a measure of variation, the sample _________ is easy to understand and compute. It is based on the

two extreme values and is therefore a highly unstable measure.

A. Range

B. Standard deviation

C. Variance

D. Interquartile range

E. Coefficient of variation

47. If there are 130 values in a data set, how many classes should be created for a frequency histogram?

A. 4

B. 5

C. 6

D. 7

E. 8

48. If there are 120 values in a data set, how many classes should be created for a frequency histogram?

A. 4

B. 5

C. 6

D. 7

E. 8

Full file at https://fratstock.eu 49. If there are 62 values in a data set, how many classes should be created for a frequency histogram?

A. 4

B. 5

C. 6

D. 7

E. 8

50. If there are 30 values in a data set, how many classes should be created for a frequency histogram?

A. 4

B. 5

C. 6

D. 7

E. 8