FORMULAE IN PSYCHOLOGICAL STATISTICS : Theories And Problems With Solutions

Statistics has its roots in the idea of “the state of things. The word itself comes from the ancient Latin term ‘Statisticum’ (collegium) meaning “a lecture on the state of affairs”. In Italian it pronounce as Statistik means “Collection of data involving the State”. Gradually the term came to be used to describe the collection of any sort of data. Later on Statistics was defined as the branch of Mathematics which deals with numerical data. Now Statistics is emerging as an interpretation of data obtained by conducting research. List of Theorems:1) Central Limit Theorem2) Hypothesis3) Level of Significance4) ParametricA) t-test for small samples (nB) ANOVA (Analysis of Variance)C) Pearsons Coefficient of CorrelationD) Z-test for large Samples (n>30)E) F-testF) R-test5) Non-ParametricG) Chi-SquareH) Spearmans Rank difference method of CorrelationI) Kendalls Rank Difference Method andJ) Mann-Whitney U-test.K) Karl Pearsons Coefficient of CorrelationL) Kendalls Tau correlation method