A.P. STATISTICS
LESSON 13 -1
(DAY 1)
CONDUCTING INFERENCE BY
SIMULATION
ESSENTIIAL QUESTION:
How can the graphing calculator be
used to simulate problems involving
chi-square ?
Objectives:
• To set up simulations to solve problems.
• To use the calculator to find P-values for
chi-square.
Example 13.3 Page 739
The Graying of America (continued…)
When examining the data take notice that
the biggest difference happens to be the 0 to
24 age bracket.
Program POP
TI-83
TI-89
FINDING X2 P-VALUE FROM
CALCULATOR
• 2ND, List, math, sum( L2 ) to get sum from
L2. Go to 2nd , Dist, X2cdf ( sum, 1e99, df )
• 2ND, List, math, sum( L2 ) to get sum from
L2. Go to 2nd , Dist, Draw, X2shade (sum,
1e99, df )
Final Note
Remember that the X2 statistic will show
much greater variability with smaller sample
sizes. For this reason, if you simulate a
sampling problem like this with a calculator,
you should use as large a sample size as you
can without getting a memory overflow error
message.