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 …

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.

Jun 17, 2025 · Variance is a measurement of dispersion across a data set, comparing the difference between every other number in the 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.

To calculate the variance follow these steps: Then for each number: subtract the Mean and square the result (the squared difference). Then calculate the average of those squared …

Variance is a measure of variability in statistics that assesses the average squared difference between data values and the mean.

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

Dec 10, 2025 · What is variance? 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 …

Jan 2, 2025 · What is variance in statistics. Learn its symbol, equation, and properties. How to find it explained with examples.

Variance is the average of the squared differences of a random variable from its mean. It is a statistical measurement of variability that indicates how far a set of numbers varies from the …