Statistics Basics 7 | Interview Question
Question
Variance of a dataset is 144, what is the Standard Deviation?
Give a basic understanding of both the terms
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Answer ( 1 )
Variance is always the square of standard deviation in the data.
=> Standard deviation= sqrt(variance)
= sqrt(144)
= 12
Variance is a measure of how spread out a data set is. It is calculated as the average squared deviation of each number from the mean of a data set.
Standard deviation is the measure of spread, most commonly used in statistical practice when the mean is used to calculate central tendency.