Z-Scores and the Standard Normal Distribution
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
What is a "z-score"?
📘 Worked solution
✓A measure of how many standard deviations a value is from the mean.
And one from the hard end
A distribution has μ=50, σ=10. Find the z-score for x=65.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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