Standardized Scores and Comparing Data Sets
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
A z-score tells you how many ___ a value is from the mean.
📘 Worked solution
✓A z-score expresses distance from the mean in units of standard deviation, not raw units.
And one from the hard end
A z-score of 3 is generally considered...
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
Your Winny Score tracks you as the questions ramp up. Stuck on one? A real Winny Math tutor will walk you through it — first lesson free.
Start practicing