The student clearly described the data collection and processing, with appropriately presented tables and graphs, units, and measurement precision. The student processed the titer data using means, standard deviations, relative standard deviations, and stoichiometric calculations to determine Fe²⁺-equivalent concentrations, which addressed the research question. The student also recognized that permanganate measured total reducing capacity rather than iron specifically, and the reported results showed a decline with longer cooking times. However, the student did not calculate or discuss how measurement uncertainties affected the reported concentrations and observed trend.
