Casio CFX-9970G Manual page 59

k k k k k Student-t Distribution
You can use the following menu to select from the different types of Student-
distribution.
• {tpd}/{tcd} ... {Student-
calculation
u u u u u Student-t probability density
t
Student- probability density calculates whether data taken from a
less than a specific value.
df + 1
2
f (x) =
df
2
Perform the following key operation from the statistical data list.
5(DIST)
t
)
2(
1(tpd)
Data is specified using parameter specification. The following shows the meaning
of each item.
x
..................... data
df
.................... degrees of freedom (
Execute .......... executes a calculation or draws a graph
Example To calculate Student-
parameter value
For this example, we will calculate Student-
x
when
bw
cw
1(CALC)
p x
( ) ................. Student-
t
probability density}/{Student-
df +1
–
2
1 + x 2
df
df
df
t
probability density for a specific
= 1 and degrees of freedom = 2.
t
probability density
Distribution
t
distribution probability}
t
> 1)
t
probability density
18 - 8
t
distribution is
307