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

Jul 23, 2025 · In statistics, sample variance tells us how spread out the data points are from the average (mean) within a sample. Sample variance computes the mean of the squared …

Dividing by n-1 gives a sample variance or standard deviation that better reflects the population variance or standard deviation. The denominator of ‘n-1’ is known as Bessel’s Correction Factor.

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.

Dec 10, 2025 · Read on for a complete step-by-step tutorial that'll teach you how to calculate both sample variance and population variance. Use the sample variance formula if you're working …

Sample Variance is the type of variance that is calculated using the sample data and measures the spread of data around the mean. Understand sample variance using solved examples.

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.

Calculating sample variance is essential for determining how spread out a data set is and understanding its overall variability. With these step-by-step instructions and formula, you can …

To calculate the sample variance, follow these steps: Find the Mean (x ¯ ): Add up all the sample values and divide by the number of samples (n). x ¯ = ∑ x i n Calculate Each Deviation from …

Jan 18, 2023 · When you collect data from a sample, the sample variance is used to make estimates or inferences about the population variance. The sample variance formula looks like …