Problem-Solving & Data Analysis The calculator-friendly sixth of the paper: ratios and rates, percentages, reading one- and two-variable data, probability from tables, and the study-design questions everyone forgets to prepare — every one of them answerable from a small set of moves.
The course — 6 units, in order
01 Proportional Relationships Unit rates with fractions, the constant of proportionality, y = kx, and reading proportionality from tables and graphs. Start 02 Percent Applications Percent change, discounts, markups, tax, tips, simple interest, and percent error — the percents that show up on receipts. Start 03 Describing Data Center and spread done right: mean, median, IQR, standard deviation, boxplots, and the 1.5×IQR outlier fence. Start 04 Two-Variable Data Scatterplots, the correlation coefficient, the least-squares line, and why correlation is not causation. Start 05 Probability Models Sample spaces, events, equally-likely outcomes, complements, and the addition rule with Venn diagrams. Start 06 Sampling, Studies & Inference Random sampling, bias, experiments vs observation, simulation-based inference, and margin of error — the capstone. Start 