Website
Columbia University

Columbia University: Expected Value Pdf

For Students 10th - 12th Standards
A PDF explaining and giving examples to show how the expected value of a random variable indicates its weighted average.
Unit Plan
Other

Magoosh: Statistics Fundamentals

For Students 9th - 10th Standards
An online course on the fundamentals of statistics including video lessons in Mean, Median, and Mode; Weighted Averages; Quartiles and Boxplots; Range and Standard Deviation; Normal Distribution; Z-scores; Intro to Inferential...
Activity
Texas Instruments

Texas Instruments: Heavy Hitting #2

For Teachers 9th - 10th
This activity uses baseball's slugging average to compute weighted means using summary statistics. Some students may need an explanation of the terms singles, doubles, triples, and home runs.
Handout
Other

Stat Soft: Statistics Glossary

For Students 9th - 10th
Dozens of statistical terms are defined and illustrated in this glossary.