Meaning of TSS in English

total sum of squares ; shows the total variation in the observed Y values about their mean value.

Note: TSS = ESS (explained sum of squares) + RSS (residual sum of squares), which means TSS can be partitioned into two parts, one attribute to the regression line and the other to random forces because not all actual Y values lie on the fitted line.

Sean Woo's Finance, GIS and real estate English glossary.      Английский глоссарий по ГИС(Географическая информационная система) и недвижимости Sean Woo's Finance.