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Hardbound. Zustand: As New. New. Contents Preface. 1. Concept of statistics in research. 2. Measures of dispersion percentile. 3. Correlation. 4. Normal Probability Curve (NPC). 5. Standard error of means and significance of difference. 6. Standard score and t score. Bibliography. Index. Modern education problems and needs are forcing statistical methods and statistical ideas more and more to the force. There are so many things we wish to know which cannot be discovered by a single observation or by a single measurement. We wish to study the social group composed of individuals differing from one another. The importance of statistics in educational research is universally acknowledged in the modern world for own sake as something which enriches life and help the researchers to solve their research problems. The main topics included in the book are concept of statistics in research measures of dispersion percentile correlation normal probability curve standard error of mean and significance of difference. It is hoped that the book which aims at disseminating more widely selected important information on the statistics in educational research will be found informative and useful. 142 pp.