Determine the impact of adding or removing data from a data set on a measure of central tendency, and describe how these changes alter the shape and distribution of the data
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 data set is 3, 5, 7 (mean=5). If you add 20, find the new mean.
📘 Worked solution
✓New mean = (3+5+7+20) ÷ 4 = 35 ÷ 4 = 8.75.
And one from the hard end
A data set is 6, 8, 10, 12 (mean=9). If you add 9, find the new mean.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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