September 27, 2011
In today’s exercise we calculate some of the basic measures in statistics: mean, standard deviation, linear regression, and correlation. The only hard part is that different sources use different standard names to refer to the different statistics. The formulas are shown below; all the summations are over $i$ from 1 to the number of items $n$:
Your task is to write functions to compute these basic statistics. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.