Multiple Choice Answers

Measures of dispersion
A. provide information that allow comparisons between the spreads of two or more distributions.
B. cannot be calculated for grouped data.
C. convey information on how the data is clustered around the median.
D. All of the above
Question 2 of 20 5.0 Points
Please answer questions 2-7 using the following sample data.
13 29 41 60 89
14 26 53 7 14
What is the arithmetic mean of the data?
A. 34.6
B. 14
C. 50
D. 30.4
Based on the information in the chart in #2 (above), what is the median of the data?
A. 27.5
B. 14
C. 34.6
D. 51
Based on the information in the chart in #2 (above), what is the range of the data?
A. 14
B. 34.6
C. 82
D. 27.5
Based on the information in the chart in #2 (above), what is the mean deviation of the data?
A. 0
B. 10.5
C. 20.9
D. 209
Based on the information in the chart in #2 (above), what is the variance of the data?
A. 231
B. 616.2
C. 685.2
D. 1,197.2
Based on the information in the chart in #2 (above), what is the standard deviation of the data?
A. 0.2
B. 24.83
C. 26.18
D. 34.61
The coefficient of variation generally lies between:
A. -1 and +1.
B. -3 and +3.
C. 0% and 100%.
D. unlimited values.
The mean of a data set is 20 and s = 2. According to Chebyshev’s theorem, what is the percentage of values that lie within 3 standard deviations of the mean?
A. 11.1%
B. 68%
C. 88.9%
D. 96%
A non-normal population is determined to have a mean of 60 and a standard deviation of 4. Ninety-six percent of all observed values will occur in what range?
A. 52.16-67.84
B. 50-60
C. 48-72
d.40-80