Enhancing Statistical Education in Chemistry and STEAM Using JAMOVI. Part 2. Comparing Dependent Groups and Principal Component Analysis (PCA)

In statistics and chemometrics education for chemistry
and STEAM
(Science, Technology, Engineering, Arts, and Mathematics) students,
gone are the days of laborious calculations and conclusions based
solely on p values. Free and graphical user interface
(GUI) software like JAMOVI streamlines calculations, generates informative
plots, and fosters a deeper understanding beyond just p values. This article serves as a comprehensive guide for instructors
on utilizing JAMOVI to teach essential parametric and nonparametric
tests commonly encountered in these fields. Our focus centers on a
paired samples t test, Wilcoxon rank sum test, repeated
measures ANOVA (RMANOVA), and Friedman test. We also delve into principal
component analysis (PCA) using the MEDA plugin, which generates high-quality
colored plots that visually elucidate trends between groups. Through
21 guided questions, students will assess data normality, compare
dependent groups using both parametric and nonparametric tests, explore
comparisons between dependent groups, and observe trends using PCA.
These STEAM-contextualized questions and practical examples empower
educators to seamlessly integrate JAMOVI into their teaching, enhancing
the learning experience for students.