Standard Deviation Calculator

Calculate standard deviation & variance

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About Standard Deviation Calculator

A standard deviation calculator that computes both population and sample standard deviation, along with variance, coefficient of variation, standard error, and Z-scores for each data point. Shows step-by-step squared deviations and supports confidence interval estimation. All processing is client-side. Essential for statistics students, researchers, data analysts, and quality control professionals.

Standard Deviation Calculator Features

  • Population & sample
  • Variance
  • Z-scores
  • Confidence intervals
  • Step-by-step

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