Casio CFX-9970G User Manual page 324

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Distribution
k k k k k Normal Distribution
You can use the following menu to select from the different types of calculation.
• {Npd}/{Ncd}/{InvN} ... {normal probability density}/{normal distribution
u u u u u Normal probability density
Normal probability density calculates the probability that data taken from a normal
distribution is less than a specific value. Normal probability density is applied to
standard normal distribution.
Perform the following key operation from the statistical data list.
Data is specified using parameter specification. The following shows the meaning
of each item.
• Specifying % = 1 and µ = 0 specifies standard normal distribution.
Example
probability}/{inverse cumulative normal distribution} calculation
2
(x – µ) µ
1
–
f(x) = e
2
2
%
2
$%
5(DIST)
1(NORM)
1(Npd)
x
..................... data
% ..................... population standard deviation ( % > 0)
µ ..................... population mean
Execute .......... executes a calculation or draws a graph
To calculate the normal probability density for a specific
parameter value
For this example, we will calculate the normal probability
density when
dgw
cw
dfw
1(CALC)
p x
( ) ................. normal probability density
(% > 0)
x
= 36, % = 2 and µ = 35.
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