Journal of Statistics Education, Volume 18, Number 2 (2010)
The Effects of Data and Graph Type on Concepts and Visualizations
Linda L. Cooper
Felice S. Shore
Journal of Statistics Education Volume 18, Number 2 (2010),
Z - Scores
Why is this Impor tant?
How do you compare apples and oranges?
Are you as good a student of French as you are in Physics?
How many people did better than you on a test?
How many did worse?
Are you abnormal or deviant?
Dr So and So, are you goin
5. STANDARD DEVIATIONS
The standard deviation is the most widely used measure of
dispersion (fluctuation, risk, volatility).
Eg 1: Consider the monthly returns of Intel and Hershey Foods,
over a period of 10 years.
Intel and Hershey Returns