Margin of Error Calculator: Mean, Sample SD, and SEM from Raw Data
Calculate the mean, sample standard deviation, and standard error from raw data online to support margin of error checks, confidence interval setup, and sample size planning.
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.