Data Management (MDM4U) · Organizing Data

Measures of Spread — Variance and Standard Deviation

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.

Start the 10 questions Curriculum: MDM4U-OD.2

Sample: the first question, solved

Find the range of 5, 9, 3, 12.

📘 Worked solution

✓Range = max − min = 12 − 3 = 9.

And one from the hard end

Which formula correctly computes SAMPLE variance from data x₁...xₙ with sample mean x̄?

Solution shown after you try it in practice mode.

Work through all 10, easiest to hardest

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