Jan 18, 2023 · The variance reflects the variability of your dataset by taking the average of squared deviations from the mean.

Dec 10, 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 statistical …

3 days ago · Variance is a statistical measure that shows how spread out a set of data values is from their average (mean). To calculate variance, you find the mean of the data, subtract the mean from …

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. …

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 these values …

Nov 4, 2025 · The formula for variance of a is the sum of the squared differences between each data point and the mean, divided by the number of data values. This calculator uses the formulas below in …

Nov 4, 2025 · For sample variance, it is often denoted by s². The formula used for calculating the Variance is discussed in the image below: How to Calculate Variance? In general, variance means …

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 the number of …

Jan 14, 2026 · Learn the variance formula in statistics with step-by-step explanation, examples, population vs sample variance, and FAQs to master the concept easily.

There are two commonly used forms of the variance formula: one for a population and for a sample. The type of data available determines which formula to use. In the context of statistics, a population is an …