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309
Perform the following key operation to display a graph.
J
cc
6(DRAW)
uu
uu
uStudent-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
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