title: Calculating Pearson correlation
body: <p>I'm trying to calculate the Pearson correlation coefficient of two variables. These variables are to determine if there is a relationship between number of postal codes to a range of distances. So I want to see if the number of postal codes increases/decreases as the distance ranges changes.</p>
  
  <p>I'll have one list which will count the number of postal codes within a distance range and the other list will have the actual ranges.  </p>
  
  <p>Is it ok to have a list that contain a range of distances? Or would it be better to have a list like this [50, 100, 500, 1000] where each element would then contain ranges up that amount. So for example the list represents up to 50km, then from 50km to 100km and so on.</p>