Which of the following is a correct statement?
a. The interquartile range is found by taking the difference between the first and third quartiles and dividing that value by 2.
b. The standard deviation is expressed in terms of the original units of measurement but the variance is not.
c. The values of the standard deviation may be either positive or negative, while the value of the variance will always be positive.
d. A large measure of dispersion is the result of an error of calculation because there is a limit to how widely spread out data can be.
Q. 2Adding 5 to each value in a data set would not change which of the following measures?
a. Mode
b. Mean
c. Mid-range
d. Standard deviation
Q. 3The following data set represents shirt sizes for girls' field hockey team: S, S, S, M, M, M, M, M, M, M, M, M, M, L, L, L, L, L, XL, XL Select the most appropriate measure of central tendency for the data described.
a. Mean
b. Median
c. Mode
d. Midrange
Q. 4Which of the following is not a measure of central tendency?
a. Mean
b. Median
c. Midrange
d. None of the above
Q. 5The measure most affected by extreme values is the:
a. mean
b. second quartile
c. first quartile
d. midquartile
Q. 6Which of the following is not affected by extreme values?
a. Median
b. Tenth percentile
c. Third quartile
d. All of the above
Q. 7The following set of data represents the temperature high for seven consecutive days in February in Chicago: 22, 14, 26, 27, 35, 38, and 41 . Select the most appropriate measure of central tendency for the data described.
a. Mean
b. Median
c. Mode
d. Midrange
Q. 8The following set of data represents the ages of students in a small seminar: 20, 21, 22, 25, 26, 27, and 68 . Select the most appropriate measure of central tendency for the data described.
a. Mean
b. Median
c. Mode
d. Midrange
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