The population of a country is known to have blood groups 0, A, B and AB in

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The population of a country is known to have blood groups 0, A, B and AB in the ratio 5:3:2: 1.220 people are randomly selected from the population of a neighbouring country. Their blood group is assessed and the results tabulated.


Test at the 5% significance level whether or not the neighbouring country's population has the same proportions of blood groups.

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