# Sum of squared errors [duplicate]

Why do we use SSE (the sum of squared errors) in calculations. Why do not we use the sum of errors? Could you explain please?

• I presume you meant "sum of absolute errors" for sum of errors. – ttnphns Apr 19 '14 at 14:09
• The main reasons are two: 1) SSE is related to the estimating of the mean (See closely related question); 2) SSE and the mean are naturally related to linear algebra computations (see e.g. this). Still, absolute error is used sometimes too (for example when the central tendency is median). – ttnphns Apr 19 '14 at 14:15
• Basically a duplicate of this, where in turn this is linked as 'essentially a duplicate'. Another near duplicate is this. There are others as well. – Glen_b Apr 19 '14 at 17:14