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  /external/apache-commons-math/src/main/java/org/apache/commons/math/stat/regression/
SimpleRegression.java 75 /** total variation in y (sum of squared deviations from ybar) */
88 private double ybar = 0; field in class:SimpleRegression
140 ybar = y;
143 double dy = y - ybar;
148 ybar += dy / (n + 1.0);
176 double dy = y - ybar;
181 ybar -= dy / (n - 1.0);

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