Texas Instruments TI-84 Plus Manual Book page 337

If the height distribution among a population of women is normally distributed with a
mean m of 165.1 centimeters and a standard deviation s of 6.35 centimeters, what height
is exceeded by only 5 percent of the women (the 95th percentile)?
10. Press ' to clear the home screen.
Press y = to display the
(distributions) menu.
11. Press to paste
3
Press Ë ¢
95
.95 is the area, 165.1 is m, and 6.35 is s.
The result is displayed on the home screen; it shows that five percent of the women are
taller than 175.5 centimeters.
Now graph and shade the top 5 percent of the population.
12. Press p and set the window variables to
these values.
Xmin=145 Ymin=
Xmax=185 Ymax=.08
Xscl=5 Yscl=0
Chapter 13: Inferential Statistics and Distributions
DISTR
to the home screen.
invNorm(
Ë ¢ Ë
165 1 6 35
L
.02 Xres=1
¤ Í.
334