Index


Table 5.

Table 5 gives some indications of whether the estimation was successful. The mean residual (Resd) should be 0.0, the mean standardized residual (StRes) should be close to 0.0, and the standard deviation of the standardized residuals of the sample should be close to 1.0.

 

Table 5. Measurable Data Summary.
+--------------------------------------------------+
| Cat  Score  Exp.  Resd StRes|                    |
|-----------------------------+--------------------|
| 2.58  2.58  2.58   .00  .02 | Mean (Count: 1946) |
|  .61   .61   .41   .46  .96 | S.D. (Population)  |
|  .61   .61   .41   .46  .96 | S.D. (Sample)      |
+--------------------------------------------------+
Data log-likelihood chi-square = 2255.4458
Approximate degrees of freedom = 1907
Chi-square significance prob.  = .0000
                                         Count   Mean   S.D.   Params
Responses used for estimation      =      1946   2.58   0.61       39
Count of measurable responses      =      1946
Raw-score variance of observations   =   0.37 100.00%
Variance explained by Rasch measures =   0.16  42.73%
Variance of residuals                =   0.21  57.27%