Standard deviation (σ) calculator with mean value & variance online.
Enter data values delimited with commas (e.g: 3,2,9,4) or spaces (e.g: 3 2 9 4) and press the Calculate button.
Enter probability or weight and data number in each row:
Population mean:
Population standard deviation:
Sample mean:
Sample standard deviation:
Random variable mean:
Discrete random variable standard deviation:
