How to use:
- Enter x values in the first text area (comma separated, e.g., 1, 2, 3, 4, 5)
- Enter corresponding frequencies in the second text area (comma separated, e.g., 1, 5, 8, 11, 1)
- Click the Calculate button to see the results
- The table will show x, x², x³, x⁴, f(x-mean), f(x-mean)², f(x-mean)³, f(x-mean)⁴ values
- The first four moments about zero and about the mean will be calculated
- All calculation steps will be shown for better understanding