The student demonstrates a strong understanding of correct mathematical notation, symbols, and terminology, as they consistently and accurately use correlation, dependent and independent variables, significance level, and overall distribution names. However, they do not provide definitions or explanations for key terms/variables, such as degrees of freedom, expected value, chi-squared test, mean, box and whisker plot, standard deviation, and variance. Additionally, the student lacks descriptions of the main concepts and statistical tests in the introduction, and fails to define additional terms related to the statistical tests. They do, however, include multiple forms of mathematical representation, explain calculations and data presentations, and employ deductive reasoning in their investigation. The student should work on stating the degree of accuracy for rounded values and labeling graphs, tables, and diagrams at the bottom.
