Why is the squared difference so commonly used?
8860
Why square the difference instead of taking the absolute value in standard deviation?
80772
What happens when square root is performed in inequalities?
128640
Euclidean distance vs Squared
102138
Why does $\sqrt{x^2}$ seem to equal $x$ and not $|x|$ when you multiply the exponents?
60914
Square bracket notation for dimensions and units: usage and conventions
116209
Variance is the squared difference - why not to the 3, or 4 instead?
91970
What is the difference between float and double?
113516
Why can we only add or subtract things of the same dimension (meters/second, newtons, etc)?
138529
Why is the standard deviation defined as sqrt of the variance and not as the sqrt of sum of squares over N?
1290
Expectation of squared error
84018
Why is there not a simpler way to calculate the standard deviation?
116457
Should I use multiplication or division?
94136
Why is variance squared?
98697
What's the difference between variance and standard deviation?
135727
Error Measures, why is the sum halved? why not use the absolute value?
46446
What's the difference between dot syntax and square bracket syntax?
102638
Computing variance of squared difference of i.i.d. uniform random variables