The sum of deviations about the arithmetic mean is always equal to zero. A. True B. False 2. The average of the squared deviations about the arithmetic mean is called the variance. A. True B. False 3. The sample standard deviation is calculated by taking the square root of the population standard deviation. A. True B. False 4. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals a. 9. b. 4096. c. 8. d. 6561.

Name: 1 the sum of deviations about the arithmetic mean is always equal to zero a true b false 2 the average of the squared deviations about the arithmetic mean is called the variance a true b fal 04354
Uploaded: 2022-02-15T20:30:09-08:00
Duration: 5 min 30 s
Channel: Krishna G
Description: 1 the sum of deviations about the arithmetic mean is always equal to zero a true b false 2 the average of the squared deviations about the arithmetic mean is called the variance a true b fal 04354

          The sum of deviations about the arithmetic mean is always equal to zero. A. True B. False
2. The average of the squared deviations about the arithmetic mean is called the variance. A. True B. False
3. The sample standard deviation is calculated by taking the square root of the population standard deviation. A. True B. False
4. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals 
a. 9.
b. 4096.
c. 8.
d. 6561.

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Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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02/15/2022

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The sum of deviations about the arithmetic mean is always equal to zero. A. True B. False 2. The average of the squared deviations about the arithmetic mean is called the variance. A. True B. False 3. The sample standard deviation is calculated by taking the square root of the population standard deviation. A. True B. False 4. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals a. 9. b. 4096. c. 8. d. 6561.