This document discusses statistical analysis using SPSS. It describes descriptive statistics, which present data in a usable form by describing frequency, central tendency, and dispersion. Inferential statistics make broader generalizations from samples to populations using hypothesis testing. Hypothesis testing involves research hypotheses, null hypotheses, levels of significance, and type I and II errors. Choosing an appropriate statistical test depends on the hypothesis and measurement levels of the variables. SPSS is a comprehensive system for statistical analysis that can analyze many file types and generate reports and statistics.