Knormal distribution – Casio fx-9750G PLUS User Manual
Page 333
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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
from a specified
x
value. Normal probability density is applied to the standard
normal distribution.
πσ
2
f
(x) = 1
e
–
2
2
σ
(x –
µ
)
2
µ
(
σ > 0)
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
x
= 36,
σ = 2 and µ = 35.
dgw
cw
dfw
1
(CALC)
p
(
x
) ................. normal probability density
Distribution
18 - 8
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