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 ...

The Journal of Experimental Education publishes basic and applied-research studies that use the range of quantitative and qualitative methodologies found in the behavioral, cognitive, and social ...

Tallying is a way of recording data that counts in groups of five. The data is tallied as it is counted, with a mark for each piece of data, and then the frequency is recorded at the end. Frequency ...