Jun 17, 2025 · What Is Variance? Variance is a statistical measurement of how large of a spread there is within a data set.

Nov 4, 2025 · Variance is defined as the square of the standard deviation, i.e., taking the square of the standard deviation for any group of data gives us the variance of that data set.

Feb 11, 2022 · Once you understand standard deviation, it’s much easier to understand variance. The variance, typically denoted as σ2, is simply the standard deviation squared. The formula to find the …

Jan 18, 2023 · The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set. The more spread …

3 days ago · This page discusses measures of spread in datasets, such as range and standard deviation, which are essential for understanding data variation beyond averages. It illustrates these …

In probability theory and statistics, variance is the expected value of the squared deviation from the mean of a random variable. The standard deviation is obtained as the square root of the variance. …

Variance is a measure of variability in statistics. It assesses the average squared difference between data values and the mean. Unlike some other statistical measures of variability, it incorporates all …

Variance is a statistical measurement that is used to determine the spread of numbers in a data set with respect to the average value or the mean. The standard deviation squared will give us the variance.

Nov 4, 2025 · Calculates variance and standard deviation for a data set. Calculator finds variance, the measure of data dispersion, and shows the work for the calculation.

How to find the sample variance and standard deviation in easy steps. Includes videos for calculating sample variance by hand and in Excel.