The variance is:a. The square root of the sum of squared deviations from the meanb. The average of squared deviations from the meanc. The average of absolute deviations from the meand. The square of the standard deviation
Question
The variance is:a. The square root of the sum of squared deviations from the meanb. The average of squared deviations from the meanc. The average of absolute deviations from the meand. The square of the standard deviation
Solution
The correct answer is b. The variance is the average of squared deviations from the mean. It is a statistical measurement of the spread between numbers in a data set. More specifically, variance measures how far each number in the set is from the mean (average) and thus from every other number in the set. Variance is often denoted by the symbol σ^2.
Similar Questions
The variance is the mean squared deviation of all the values from the mean.Select one:TrueFalse
What is the relationship between the variance and the standard deviation?Select one:A. Variance is the square of the standard deviationB. Variance is the square root of the standard deviationC. Variance is twice the standard deviationD. No constant relationship between variance and standard deviation
How is the standard deviation related to the variance of a data set? It is the square of the variance It is the square root of the variance It is half the variance It is twice the variance
The standard deviation is computed by dividing the sum of the squared deviations by the number of observations. A. TRUE B. FALSE C. I don't know
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