Casio CFX-9970G, Руководство пользователя

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308
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
=
-
-
df
$
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 operation 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
>
1)
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.
- c w
d w
bi
w
1
(CALC)
prob ................ Student-
t
distribution probability
18 - 8
Distribution