Casio CFX-9970G User Manual page 292

18 - 5
Performing Statistical Calculations
k k k k k Probability Distribution Calculation and Graphing
You can calculate and graph probability distributions for single-variable statistics.
u u u u u Probability distribution calculations
Use the RUN Mode to perform probability distribution calculations. Press K in
the RUN Mode to display the option number and then press 6 (g) 3 (PROB)
6 (g) to display a function menu, which contains the following items.
• {P(}/{Q(}/{R(} ... obtains probability {P(
• {
• Probability P(
Example
1. In the STAT Mode, input the height data into List 1 and the frequency data into
t
(} ... {obtains normalized variate
t t
), Q( ), and R(
the following formulas.
t
P( )
The following table shows the results of measurements of the
height of 20 college students. Determine what percentage of
the students fall in the range 160.5 cm to 175.5 cm. Also, in
what percentile does the 175.5 cm tall student fall?
Class no.
1
2
3
4
5
6
7
8
9
10
List 2.
t
)}/{Q(
t x
( ) value}
t
), and normalized variate
Q(
Frequency
Height (cm)
158.5 1
160.5 1
163.3 2
167.5 2
170.2 3
173.3 4
175.5 2
178.6 2
180.4 2
186.7 1
t t
)}/{R( )} value
t x
( ) are calculated using
t
)
t
R( )
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