Measures of Spread - Variance and Standard Deviation
30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.
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
Monthly expenses ($100s): 22, 18, 25, 30, 15, 27, 20, 24 (8 values). Which of the following correctly gives the mean and sample standard deviation (rounded to 2 decimals)?
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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