Examining data about: statistical and statistical concepts, statistical classification and characteristics; data studies regarding concepts, classification and functions of data; population and sample and how to determine the sample; descriptive statistics and application to analyze data and/or create graphs/diagrams measuring central values and locations for single data and group data, measuring deviations; testing analytical prerequisites for normality and homogeneity tests; analysis of two samples that are correlated with each other via the Z test, product moment correlation test, Wilcoxon test; Comparative test of two independent samples using the t test, gain test and Mann Whitney test.