FIT:normal_fit

weights

 Syntax: FIT\WEIGHTS w y=expression
         FIT\WEIGHTS\-ZEROS w y=expression
         FIT\WEIGHTS\TOLERANCE w eps y=expression
         FIT\WEIGHTS\ITMAX w n y=expression
         FIT\WEIGHTS\ITMAX\TOLERANCE w n eps y=expression
         FIT\WEIGHTS\-ZEROS\ITMAX w n y=expression

 To make use of the weight array, the \WEIGHTS qualifier MUST be
 entered. The optional weight vector, w, will then be expected. The
 weights are assigned to the dependent variable in a one-to-one fashion,
 so the length of w must be the same as the length of y.  If the \ITMAX
 qualifier is used, the weight array comes before the iteration maximum
 in the parameter list.  If the \TOLERANCE qualifier is used, the weight
 array comes before the tolerance value in the parameter list.

zeros

 By default, the zero elements of the weight vector are used for
 calculating the number of degrees of freedom. If the \-ZEROS, or
 \NOZEROS, qualifier is used with the \WEIGHTS qualifier, then the
 zero elements of the weight vector will not be used when calculating
 the number of degrees of freedom.  This could have an affect on the
 calculation of the confidence level, the chi-square per degrees of
 freedom, and E2, the root mean square total errors of estimate.