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exercise 11 what is the average amount donated per capita across finland and romania in 20192 country population in amount donated (€ per person) 2019 1999 2009 2019 (thousands) finland sweden norway 7497 10120 5328 3.51 7.12 5.03 3.75 7.25 5.18 3.94 7.39 5.47 slovakia 5435 2.88 3.01 3.06 romania 21190 3.23 3.28 3.37 a) 3.52 b) 3.49 c) 3.59 d) 3.63 e) 3.68 solution: i have chosen this kind of exercise to warn my readers of a common mistake in numerical questions: trying to calculate an average between two groups, in this case the per capita donations of two countries, by simply adding the values of each country and then dividing by two. the failure of this numerical reasoning is that you would not be taking into account the different population size of each country, which has an effect on the relative weight on the average. 71
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