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
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
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
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Statistics Multiple Choice
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
с. 2
5. The measures that are used to determine the degree or extent of variation in a data set are called
а. О
b. 1
d. 5
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
а. О
b. 4096
с. 8
d. 6561
7. Which of the following is not a measure of dispersion
b. 50th percentile
a. range
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
c. the data set could be either a sample or a population
b. the data set is a population
d. the data is from a census
9. The measure of dispersion that is influenced most by extreme values is
b. standard deviation
d. interquartile range
c. range
10. The descriptive measure of dispersion that is based on the concept of a deviation about the mean is
c. both and b
a. variance
a. range
b. interquartile range
d. standard deviation
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