Question 7 • Concepts in Probability and Statistics A
To find the mean, first use the donation amounts and the number of people who gave each amount to calculate the total donated. Add those amounts to get $2,550, and add the people to get 25. Then divide the total by the number of people: $2,550 ÷ 25 = $102, so the mean donation is $102. Dividing 25 by $2,550 reverses the calculation and does not give the mean.
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