Find mean of 4, 7, 7, 10, 12.

Answer: \(\frac{40}{5}=8\).

Find median of 5, 2, 9, 4, 11, 6.

Answer: Order: 2,4,5,6,9,11. Median \(=\frac{5+6}{2}=5.5\).

Find mode of 3, 5, 5, 5, 8, 8, 9.

Answer: 5.

For values 1,2,3 with frequencies 4,5,1, find mean.

Answer: \(\bar{x}=\frac{1(4)+2(5)+3(1)}{10}=\frac{17}{10}=1.7\).

Which average is best for house prices with extreme luxury homes?

Answer: Median (less affected by outliers).

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