Making sense of statistics : a conceptual overview / Fred Pyrczak.

_ The empirical approach to knowledge -- Types of empirical research -- Introduction to sampling -- Scales of measurement -- Descriptive, correlational, and inferential statistics -- Frequencies, percentages, and proportions -- Shapes of distributions -- The mean : an average -- Mean, median, and mode -- Range and interquartile range -- Standard deviation -- Correlation -- Pearson r -- Coefficient of determination -- Scattergram -- Multiple correlation -- Variations on random sampling -- Sample size -- Standard error of the mean -- Introduction to the null hypothesis -- Decisions about the null hypothesis -- Introduction to the t test -- Reports of the results of t tests -- One-way ANOVA -- Two-way ANOVA -- Chi-square -- Limitations of significance testing -- Effect size.