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Standard deviation calculator — mean, median, mode, variance

Paste numbers to get the mean, median, mode, population and sample standard deviation and variance, quartiles and standard error, with the working. Also find a z-score and percentile from a mean and SD.

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How to use

1
Paste your data.
2
Read population and sample SD.
3
Open "Show the working" for steps.

When to use it

Statistics class

SD with the working.

Test scores

Find your percentile.

Spreadsheet data

Paste a column.

Good to know

Population for a full set, sample for a sample.
Excel STDEV.P = population, STDEV.S = sample.
The percentile mode assumes a normal distribution.

FAQ

Population vs sample?

Divide by n or by n − 1.

Percentile?

Use the z-score mode.

Quartiles?

Same as Excel QUARTILE.INC.

Related searches

#standarddeviationcalculator
#standarddeviationcalculatorwithsteps
#meanmedianmodecalculator
#variancecalculator
#zscorecalculatorpercentile
#samplestandarddeviationcalculator