A. Multiple Choice. Choose the letter of the best answer. 1. Statistically, the spread or scatteredness of observations in a data is called a. discriminant b. dispersion c. range d. standard deviation _2. The mean of the squared deviations of some observations from their arithmetic mean is called a. standard deviation b. variation C. median d. mode 3. The positive square root of the mean of the squared deviations of some observations from their arithmetic mean is called a. standard deviation b. variation c. median d. mode 4. Sum of the deviations of a variable from its mean is always b. 1 c. 2 d. 5 5. The measures that are used to determine the degree or extent of variation in a data set are called a. mean b. median C. measures of dispersion d. measures of central tendency 6. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals 960 69 c. 8 d. 6561 7. Which of the following is not a measure of dispersion a. range b. 50th percentile C. standard deviation d. variance 8. If the variance of a data set is correctly computed with the formula using n-1 in the denominator, which of the following is true? a. the data set is a sample b. the data set is a population c. the data set could be either a sample or a population d. the data is from a census 9. The measure of dispersion that is influenced most by extreme values is a. variance b. standard deviation c. range d. interquartile range 10. The descriptive measure of dispersion that is based on the concept of a deviation about the mean is b. interquartile range c. both and b d. standard deviation a. range
A. Multiple Choice. Choose the letter of the best answer. 1. Statistically, the spread or scatteredness of observations in a data is called a. discriminant b. dispersion c. range d. standard deviation _2. The mean of the squared deviations of some observations from their arithmetic mean is called a. standard deviation b. variation C. median d. mode 3. The positive square root of the mean of the squared deviations of some observations from their arithmetic mean is called a. standard deviation b. variation c. median d. mode 4. Sum of the deviations of a variable from its mean is always b. 1 c. 2 d. 5 5. The measures that are used to determine the degree or extent of variation in a data set are called a. mean b. median C. measures of dispersion d. measures of central tendency 6. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals 960 69 c. 8 d. 6561 7. Which of the following is not a measure of dispersion a. range b. 50th percentile C. standard deviation d. variance 8. If the variance of a data set is correctly computed with the formula using n-1 in the denominator, which of the following is true? a. the data set is a sample b. the data set is a population c. the data set could be either a sample or a population d. the data is from a census 9. The measure of dispersion that is influenced most by extreme values is a. variance b. standard deviation c. range d. interquartile range 10. The descriptive measure of dispersion that is based on the concept of a deviation about the mean is b. interquartile range c. both and b d. standard deviation a. range
A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Transcribed Image Text:A. Multiple Choice. Choose the letter of the best answer.
1. Statistically, the spread or scatteredness of observations in a data is called
a. discriminant
b. dispersion
c. range
d. standard deviation
_2. The mean of the squared deviations of some observations from their arithmetic mean is called
a. standard deviation
b. variation
C. median
d. mode
3. The positive square root of the mean of the squared deviations of some observations from their
arithmetic mean is called
a. standard deviation
b. variation
c. median
d. mode
4. Sum of the deviations of a variable from its mean is always
b. 1
c. 2
d. 5
5. The measures that are used to determine the degree or extent of variation in a data set are called
a. mean
b. median
C. measures of dispersion
d. measures of central tendency
6. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals
960 69
c. 8
d. 6561
7. Which of the following is not a measure of dispersion
a. range
b. 50th percentile
C. standard deviation
d. variance
Transcribed Image Text:8. If the variance of a data set is correctly computed with the formula using n-1 in the denominator, which of the
following is true?
a. the data set is a sample
b. the data set is a population
c. the data set could be either a sample or a population
d. the data is from a census
9. The measure of dispersion that is influenced most by extreme values is
a. variance
b. standard deviation
c. range
d. interquartile range
10. The descriptive measure of dispersion that is based on the concept of a deviation about the mean is
b. interquartile range
c. both and b d. standard deviation
a. range
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