The Formula for Correlation Correlation combines two important and related statistical concepts: variance and standard deviation. Variance is the dispersion of a variable around the mean.

A standard deviation of 6 means the logos whose votes were within 6 points of the mean is the most popular choice. So, as for the logos, more people like Logos 1 and 2 than they liked 3 and 4.

Calculating standard deviation manually can be time-consuming and complex. Excel's STDEV formula can automatically calculate the standard deviation of any set of numbers, so you don't have to go ...