Variance Calculator

Calculate variance, standard deviation, mean, median, and comprehensive statistical analysis with support for both sample and population data

Sample Datasets

Data Type

Uses Bessel's correction (n-1) for unbiased estimation

Enter Your Data

Separate values with commas, spaces, or line breaks

What is Variance?

Variance measures how spread out data points are from the mean. Higher variance indicates greater variability.

Sample vs Population

Sample variance uses (n-1) denominator for unbiased estimation, while population variance uses n.

Standard Deviation:

The square root of variance, expressed in the same units as the original data for easier interpretation.

Coefficient of Variation (CV):

Relative measure of variability (CV = σ/μ × 100%). Useful for comparing datasets with different units or scales.

Quality Control:

Monitor process consistency and identify when products deviate from specifications.

Risk Assessment:

Evaluate investment risk, insurance claims, and financial portfolio volatility.

Research Analysis:

Compare experimental groups, validate research findings, and assess data reliability.

Performance Evaluation:

Analyze employee performance, sports statistics, and operational efficiency metrics.