"And if someone would doubt my results, I should say to him: "Let us calculate Sir": and thus by taking to pen and ink, we should soon settle the question." (Gottfried Wilhelm Leibniz, from "Preface to the Universal Science" (1677))(For more quotations, try the Random Statistical Quotation server at Arizona State University.)
"I do not understand how we can teach practical and exact science on the basis of statistics." (Claude Bernard, from An Introduction to the Study of Experimental Medicine (1927))
You can use this page to calculate averages (means, medians, and modes), along with variance and standard deviation, using your own numerical data or the numbers given below.