Statistics
These are real, released Algebra I Regents questions on data and statistics. For a single data set, you'll compare center and spread — mean, median, IQR, and standard deviation — and judge the effect of an outlier. For two related variables, you'll find the line of best fit (the linear regression equation) and the correlation coefficient , judge a fit's strength and direction, separate correlation from causation, and read a two-way frequency table.
For the show-your-work questions, do the calculation (or run your calculator's regression), then reveal the official NYSED rubric, a worked model solution, and any figure to score yourself. The multiple-choice items check the reasoning — what the spread tells you, what means, and whether a link is truly cause-and-effect.
Linear regression & correlation
| Week (x) | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Dollars earned, in millions (y) | 185 | 150 | 90 | 50 | 25 | 5 |
Work it out on paper first — this is a show-your-work question. When you're done, reveal the rubric and model solution to score yourself.
Your score appears when you finish.
For teachers
Standard, common misconceptions, and suggested use will live here.