Focus on correlation and regression

The search for meaningful relationships between two variables. Here we take the leap from 1 variable to 2 variable data analysis. In any given survey we collect data for a number of "items" surveyed. For example, a survey might be of 1000 people who visit a given supermarket. We might collect their age and we might collect the amount they spent. In each case we could analyse the variables independently and perhaps come...
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