> If you've taken elementary Math you'll understand that if an average increases that means the extremes of the dataset have gotten more extreme (more extreme c

> If you've taken elementary Math you'll understand that if an average increases that means the extremes of the dataset have gotten more extreme (more extreme colds, more extreme heat). Um, no, it doesn't. It's perfectly possible to raise the average and reduce the extremes. You can tell nothing about the variation in a dataset from the average.