The document discusses measures of central tendency including mean, mode, and median. It also discusses types of distributions such as positively and negatively skewed, as well as leptokurtic, mesokurtic, and platykurtic. The Mann-Whitney U test is introduced as a non-parametric test with assumptions of random sampling, independence of samples, and ordinal measurement. Formulas for Mann-Whitney U and sample sizes are provided. The document concludes that the topics covered are relevant for research, statistics, and testing in SPSS.