Casio fx-9750G PLUS User Manual
Page 337
309
Perform the following key operation to display a graph.
J
cc
6
(DRAW)
u
u
u
u
u
Student-t distribution probability
Student-
t
distribution probability calculates the probability of
t
distribution data
falling between two specific values.
p
=
Γ
Γ
df
π
2
df
2
df
+ 1
–
df
+1
2
df
1 + x
2
dx
a
b
∫
a
: lower boundary
b
: upper boundary
Perform the following key operations from the statistical data list.
5
(DIST)
2
(
t
)
2
(tcd)
Data is specified using parameter specification. The following shows the meaning
of each item.
Lower ............. lower boundary
Upper ............. upper boundary
df
.................... degrees of freedom (
df
> 0)
Execute .......... executes a calculation
Example
To calculate Student-
t
distribution probability for a specific
parameter value
For this example, we will calculate Student-
t
distribution
probability when lower boundary = –2, upper boundary = 3, and
degrees of freedom = 18.
-
cw
dw
biw
1
(CALC)
prob ................ Student-
t
distribution probability
Distribution
18 - 8