added missing @since tags

JIRA: MATH-529

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1073459 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math/stat/regression/AbstractMultipleLinearRegression.java

@@ -44,6 +44,7 @@ public abstract class AbstractMultipleLinearRegression implements
 
     /**
      * @return true if the model has no intercept term; false otherwise
+     * @since 2.2
      */
     public boolean isNoIntercept() {
         return noIntercept;
@@ -51,6 +52,7 @@ public abstract class AbstractMultipleLinearRegression implements
 
     /**
      * @param noIntercept true means the model is to be estimated without an intercept term
+     * @since 2.2
      */
     public void setNoIntercept(boolean noIntercept) {
         this.noIntercept = noIntercept;
@@ -287,6 +289,7 @@ public abstract class AbstractMultipleLinearRegression implements
      * Estimates the variance of the error.
      *
      * @return estimate of the error variance
+     * @since 2.2
      */
     public double estimateErrorVariance() {
         return calculateErrorVariance();
@@ -297,6 +300,7 @@ public abstract class AbstractMultipleLinearRegression implements
      * Estimates the standard error of the regression.
      *
      * @return regression standard error
+     * @since 2.2
      */
     public double estimateRegressionStandardError() {
         return Math.sqrt(estimateErrorVariance());
@@ -336,6 +340,7 @@ public abstract class AbstractMultipleLinearRegression implements
      * matrix X.
      *
      * @return error variance estimate
+     * @since 2.2
      */
     protected double calculateErrorVariance() {
         RealVector residuals = calculateResiduals();