Statistics Calculator
Full descriptive stats plus z-score for a value.
Result
Mean8
Median8
Q1 / Q3 / IQR5 / 11 / 6
Std dev (pop.)4
z-score of 80
P(X < 8)50%
Statistics Calculator — FAQs
What is a z-score?
How many standard deviations a value is from the mean. z = 1.96 ≈ 97.5th percentile in a normal distribution.
What is variance?
The square of standard deviation — average of squared deviations from the mean.
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