Casio FX-9750G PLUS User's Manual & Technical Reference page 333

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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
probability}/{inverse cumulative normal distribution} calculation
u u u u u Normal probability density
Normal probability density calculates the probability density of normal distribution
x
from a specified
value. Normal probability density is applied to the standard
normal distribution.
(x – µ)
1
f(x) =
e
πσ
2
Perform the following key operations from the statistical data list.
5(DIST)
1(NORM)
1(Npd)
Data is specified using parameter specification. The following shows the meaning
of each item.
x
..................... data
σ ..................... standard deviation ( σ > 0)
µ ..................... mean
Execute .......... executes a calculation or draws a graph
• Specifying σ = 1 and µ = 0 specifies standard normal distribution.
Example
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
2
µ
(σ > 0)
2
σ
2
x
= 36, σ = 2 and µ = 35.
18 - 8
Distribution
305

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