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Consider a large number of countries around the world. There is a positive correlation between the number of XBox One games per person x and the average life expectancy y. Does this mean that we could increase the life expectancy in Somalia by shipping XBox One games to that country?
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It makes no sense to calculate the correlation between these variables.
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Yes. The correlation says that as the number of XBox One games per person goes up, so does life expectancy.
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No. If the correlation were negative, we could accept that conclusion, but this correlation is positive.
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Yes. Positive correlation means that, if we increase x, then y will also increase.
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No. The positive correlation just shows that richer countries have both more XBox One games per person and higher life expectancies.
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Definition Definition Relationship between two independent variables. A correlation tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
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