The sample variance and standard deviation can be calculated using only the sum of the data, $\sum { x }$ and the sample size, n.

Name: The sample variance and standard deviation can be calculated using only the sum of the data, $\sum { x }$ and the sample size, n.
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Question

The sample variance and standard deviation can be calculated using only the sum of the data, $\sum  { x }$ and the sample size, n.

Quizplus · Accepted Answer

To calculate the sample variance and standard deviation, you need both the sum of the data, $\sum{x}$, and the sum of the squares of the data, $\sum{x^2}$, along with the sample size, $n$.

The Sample Variance and Standard Deviation Can Be Calculated Using ∑x\sum { x }∑x

The Sample Variance and Standard Deviation Can Be Calculated Using $\sum { x }$