Data summry Essay Example | Topics and Well Written Essays - 250 words

Data summry - Essay Example Also, the p value of the pairwise association between item (i) 4 and item (j) 67 equal 1.000; and so on for the other items. This is indicative of the insignificant relationship between those items or the relationship between them very small. In addition, it was likewise evident that item (i) 4 does not influence item(j) 67. Finally, when the Rasch model was implemented for the data coefficient items, the outcome posed significant results where z- value for some of them were more than 1.96. The discrimination of the Rasch model was therefore conclusive to be significant; meaning, the model has high ability to discriminate between items. When one tried to generate a two-parameter model for the data, the results were not at all conclusive and a massage was indicated, to wit: system is exactly singular. Therefore, there is a need to further test this model to generate a more conclusive result. In the last stage, using the two –parameter or three- parameter model, one found that the two parameter model is better because it satisfies the Akaike information criteria (AIC) and the Bayesian information criteria (BIC). As the results indicated, the two-parameter is less than three-parameter