Statistics Calculator
A statistics calculator summarizes a data set with a named measure of center or spread.
Paste a list such as: mean of 2, 4, 4, 6, 8. Name the statistic so the correct formula is used.
Solve a problem
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Example problems
How this solver works
- Parse the named measure and the list.
- Apply the matching formula.
- Population standard deviation divides by n in this first version.
Worked examples
mean 2,4,6,8
- 20/4=5
Answer: 5
Common mistakes
Average of the average
Do not average subgroup means unless you weight by group size.
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Frequently asked questions
Sample or population SD?
This calculator uses the population formula (divide by n). Check your assignment if it wants n − 1.