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Correlation and regression analysis (view source)
Revision as of 21:55, 7 January 2014
, 21:55, 7 January 2014no edit summary
following formulas:
following formulas:
:<math> a = \frac{\displaystyle \sum_{i} (y_{i}-\widehat{y_{i}})}{n - 2}</math>
:<math> s^2 = \frac{\displaystyle \sum_{i} (y_{i}-\widehat{y_{i}})}{n - 2}</math>
:<math> R^2 = 1 - \frac{\displaystyle \sum_{i} (y_{i}-\widehat{y_{i}})}{\displaystyle \sum_{i} (y_{i}-\bar{y})}</math>
where n is the number of (x, y) pairs.
where n is the number of (x, y) pairs.