Casio fx-9750G PLUS - 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