Educational Hypothesis Tests in R // Provides educational implementations of one- and two-sample Z tests, Student and Welch t tests, a paired t test, an F test for two variances, and Pearson chi-square tests for goodness of fit, independence, and homogeneity. Functions validate mutually exclusive raw-data and summary-statistics interfaces, return structured htest- compatible results, and optionally display step-by-step graphical explanations.