Casio FX-9750G PLUS User's Manual & Technical Reference page 334

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Distribution
Perform the following key operations to display a graph.
u u u u u Normal distribution probability
Normal distribution probability calculates the probability of normal distribution data
falling between two specific values.
Perform the following key operations from the statistical data list.
Data is specified using parameter specification. The following shows the meaning
of each item.
306
J
ccc
6(DRAW)
∫
(x – µ)
1
b
–
p =
e
σ
2
πσ
2
a
5(DIST)
1(NORM)
2(Ncd)
Lower ............. lower boundary
Upper ............. upper boundary
σ ..................... standard deviation ( σ > 0)
µ ..................... mean
Execute .......... executes a calculation
Example To calculate the normal distribution probability for a specific
parameter value
For this example, we will calculate the normal distribution
probability when lower boundary = –
boundary = 36, σ = 2 and µ = 35.
-bEjjw
dgw
cw
dfw
1(CALC)
prob ................ normal distribution probability
a
: lower boundary
2
µ
b
dx
: upper boundary
2
∞
(–1E99), upper