Standard Deviation Calculator for Frequency Table: Values, Counts, Mean, Variance, and SD
Calculate standard deviation from a frequency table by entering each value repeated by its count, then use the calculator results for sample or population SD, variance, mean, standard error, range, z-score, and confidence interval workflows. Built for QC engineers analyzing 20-100 batch SPC measurements, instructors summarizing score counts, and analysts converting discrete frequency tables into report-ready statistics.
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.