Confidence Interval Standard Deviation Calculator: Mean, Sample SD, and SEM from Raw Data
Calculate the mean, sample standard deviation, and standard error from raw data online. Use the results to check spread, estimate precision, and move faster into confidence interval and hypothesis test work.
12 values
Instant Math
Use when your data represents a subset of a larger population. Applies Bessel's correction.
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Input your numbers into the Standard Deviation Calculator panel to see real-time statistics, variance, and normal distribution charts.