Statistics: descriptive & regression
Mean, median, mode, standard deviation, quartiles and skew; correlation and a regression line.
Separate with commas, spaces or new lines. Paste a column from Excel.
Count (n)10
Mean80.90
Median82.50
Mode85.00
Sample std dev (s)9.11
Population std dev (σ)8.64
Sample variance82.99
Population variance74.69
Min66.00
Max94.00
Range28.00
Sum809.00
Q173.50
Q387.25
IQR13.75
Skewness-0.28
Std error of mean2.88
Coeff. of variation11.26%
Quartiles match Excel's QUARTILE.INC; skewness matches SKEW. Sorted: 66.00, 71.00, 72.00, 78.00, 80.00, 85.00, 85.00, 88.00, 90.00, 94.00
About this calculator
Paste a list of numbers to get descriptive statistics: mean, median, mode, range, sample and population standard deviation and variance, quartiles and skewness. Add a second column of paired values for the correlation coefficient and the least-squares regression line.
Formula
s = √Σ(x − x̄)² ÷ (n − 1); regression ŷ = a + bx, with b = r × sysx
- Use the sample standard deviation for data drawn from a larger population.
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