抄録
1. The authors have studied the weighted likelihoodmethod with the aid of an orthogonal table. The weight of likelihood coeffiient was determined as a higher probability of correct classification and lower of malignant misclassification.
2. Four hundred and seventy two cases of acute appendicitis were used for this study. Using this method, an attempt at type-diagnosis of acute appendicitis is made.
3. “Algorithmn” is as follows : The likelihood coefficient is already known from data. Initially the value of weight of likelihood coefficient is assumed. Then the probability of correct classifiction and that of malignant misclassification are calculated by use of the L27 (313) orthogonal table according to the value of weight. Objective function is calculated from the two above-mentioned probabilities. Analysis of variance in objective function is performed. Subsequent value of weight is calculated as higher objective function is gained. These iterations are made until the peak value of objective function is obtained.
4. As the iteration is made, better objective function is obtained by use of the weighted likelihood coefficient as compared to the original likelihood coefficient.
