신.구 두 고사 평가치 변환에 의한 진분포와 모수 추정에 관한 연구

In this thesis the following studies have been tried: 1. To estimate reliability and validity of the items of scholastic achievment tests that had been tested by the evaluation service centers. 2. To smooth the sample frequency distribution of observed scores and to estimate the frequency distribution of observed scores approximating to the Negative Hypergeometric Distribution.