- There is a rule that states that, for any normally distributed variable, approximately
95% of all the possible observations lie within 2 standard deviations to either side
of the mean.
- We can verify this by calculating P[-2 < Z < 2]. Why!? What should this equal if the
rule above is true!?
- Picture on the board.
Dr. Christina Hayes
Wilson 2-263
Department of Mathematical Sciences
Montana State University
Bozeman, MT 59717
phone: 406-994-6557
fax: 406-994-1789
christina.hayes@montana.edu
(Email will likely reach me faster than a phone call)