To calculate the variance of a discrete random variable, use the formula σ2=Σ (xi-µ)2pi. To use this formula, subtract the mean from each data value, square each result, multiply each of …

Oct 8, 2025 · Variance is a measure of how spread out a data set is, and we calculate it by finding the average of each data point's squared difference from the mean. It's useful when creating …

Jan 18, 2023 · The variance is usually calculated automatically by whichever software you use for your statistical analysis. But you can also calculate it by hand to better understand how the …

In statistics, variance is used to comprehend the correlation among numbers within a data collection, rather than employing more elaborate mathematical techniques, such as organizing …

Jul 23, 2025 · How to Calculate Variance? The symbol for variance is typically represented by the Greek letter sigma squared (σ²) when referring to the population variance. For sample …

To find the variance, take a data point, subtract the population mean, and square that difference. Repeat this process for all data points. Then, sum all of those squared values and divide by …

Mar 23, 2022 · Variance is a parameter or a statistic that measures how spread-out data is relative to its mean. We calculate variance as the average of the squared deviations from the …

6 days ago · Calculates variance and standard deviation for a data set. Calculator finds variance, the measure of data dispersion, and shows the work for the calculation.

It is calculated by taking the average of the squared differences from the mean. The square root of the variance is the standard deviation. While variance gives you a rough idea of spread, the …

The variance calculator is a great educational tool that teaches you how to calculate the variance of a dataset. The calculator works for both population and sample datasets.