varSamp

varSamp

Calculate the sample variance of a data set.

Syntax

Alias: VAR_SAMP.

Parameters

• x: The population for which you want to calculate the sample variance. (U)Int*, Float*, Decimal*.

Returned value

• Returns the sample variance of the input data set x. Float64.

Implementation details

The varSamp function calculates the sample variance using the following formula:

$$\sum\frac{(x - \text{mean}(x))^2}{(n - 1)}$$

Where:

• x is each individual data point in the data set.
• mean(x) is the arithmetic mean of the data set.
• n is the number of data points in the data set.

The function assumes that the input data set represents a sample from a larger population. If you want to calculate the variance of the entire population (when you have the complete data set), you should use varPop instead.

Example

Query:

Response: