Subject(s): Psychometrics ,Textbooks. -- Statistics -- Descriptive statistics -- Central tendency -- Measures of spread -- Standard scores -- Normal distribution -- Standard normal distribution -- Hypothesis testing -- One and two-tailed prediction -- Sampling -- Population and samples -- Sample statistics and population parameters -- Selecting sample for comparison -- Designing experiments to compare samples -- Interpretation of sample difference -- Hypothesis testing with two samples -- t Test -- Significance , error and power -- Type I and Type II errors -- Analysis of variance -- F distribution -- One factor independent measures ANOVA -- Relationship of F to t -- Multiple comparisons -- Turkey test : pairwise comparison -- Scheffe test : complex comparison -- One factor repeated measures ANOVA -- Deriving F value -- Interaction of factors in the analysis of variance -- Dividing up the between conditions sum of squares -- Simple main effects -- Calculating the two factor ANOVA -- Two factor independent measures ANOVA -- Two factor mixed design ANOVA -- Two factor repeated measures ANOVA -- Non-significant interaction -- Nonparametric analysis -- Mann-whitney U test -- Wilcoxon signed-ranks test -- One factor ANOVA for ranked data -- Kruskal-Wallis test -- Friedman test -- Analysing frequency data -- Chi-square -- X2 test -- Linear correlation and regression -- r correlation coefficient -- Spearman correlation coefficient -- Multiple correlation and regression -- Partial correlation -- Multiple correlation -- Using statistics programs on computers -- Errors in data input -- Interpreting output