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📈 Standard Deviation Calculator
Enter Dataset
Enter numbers separated by commas, spaces, newlines or tabs (minimum 2 values required)
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Data Type
Sample Data (divide by n-1)
Population Data (divide by n)
Precision (decimal places)
Load Sample Data
Clear Data
Calculate Statistics
Dataset Summary
Number of Values (n)
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Sum
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Mean
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Median
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Variability Measures
Variance
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Standard Deviation
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Range
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Coefficient of Variation
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Notes:
Standard deviation measures the spread of data points from the mean
Sample standard deviation uses n-1 (Bessel's correction) for unbiased estimation
Population standard deviation uses n (no correction)
Higher standard deviation indicates greater spread in the data