This paper offers class mark estimators for the intervals of a grouped frequency distribution, derived by parabolic interpolation between any given interval and its adjacent intervals. The objective ...

Inequalities are often used in grouped tables. For example, the category \(0 \textless m \leq 4\) means that \(m\) is larger than 0 but less than or equal to 4. If data is organised into groups, we do ...

In accordance with general principles recommended by the International Committee for Standardization in Haematology (1982, Journal of Clinical Pathology 35, 1320-1322), we have developed statistical ...