The amounts spent, in dollars, by seven customers at a bookstall are $18,20,20,22,25,27,120$. Calc

Question

The amounts spent, in dollars, by seven customers at a bookstall are $18,20,20,22,25,27,120$. Calculate the mean and find the median amount spent.[3] The organiser wants one value to describe a typical customer’s spending. Choose the more suitable of the mean and median, and explain your choice.[2]

Accepted Answer

(a) Mean $\$36$, median $\$22$ (b) Median; the isolated $\$120$ pulls the mean upwards.

Choosing a representative average

Choosing a representative average

Solution:

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