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math.algebra-standard-deviation Calculator
Calculates std deviation in mathematics. Enter numbers to get instant results. Helps students and engineers with mathematical analysis and problem solving.
Inputs
Data
Count of items or occurrences.
Results
count
Total number of items or occurrences.
mean
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.
median
The middle value of the sorted dataset.
min
Sample size or count used in the calculation.
max
Reference formula or conversion factor shown for context.
range
The difference between the maximum and minimum values.
std dev (pop)
Standard deviation -- the average spread of values around the mean. In a normal distribution: 68% within 1 SD, 95% within 2 SD.
std dev (sample)
Standard deviation -- the average spread of values around the mean. In a normal distribution: 68% within 1 SD, 95% within 2 SD.
variance (pop)
Standard deviation squared — average squared deviation from the mean. Essential for ANOVA, regression, and many statistical tests, though the squared units make it less intuitive directly.