An introduction to statistics and research design -- Frequency distributions -- Visual displays of data -- Central tendency and variability -- Sampling and probability -- The normal curve, standardization, and z scores -- Hypothesis testing with z tests -- Confidence intervals, effect size, and statistical power -- The single-sample t test -- The paired-samples t test -- The independent-samples t test -- Between-groups ANOVA -- Within-groups ANOVA -- Two-way between-groups ANOVA -- Correlation -- Regression -- Chi square tests -- Nonparametric tests with ordinal data.