TI-83 Plus
Inferential Statistics and Distributions
427
tpdf(
tpdf(
computes the probability density function (pdf) for the Student-
t
distribution at a specified
x
value.
df
(degrees of freedom) must be >0. To
plot the Student-
t
distribution, paste
tpdf(
to the
Y=
editor. The probability
density function (pdf) is:
df
df
x
df
df
x
f
df
π
2
/
)
1
(
2
)
/
1
(
)
2
/
(
]
2
/
)
1
[(
)
(
+
−
+
Γ
+
Γ
=
tpdf(
x
,
df
)
Note: For this example,
Xmin =
L
4.5
Xmax = 4.5
Ymin = 0
Ymax = .4
tcdf(
tcdf(
computes the Student-
t
distribution probability between
lowerbound
and
upperbound
for the specified
df
(degrees of freedom), which must be
> 0.
Summary of Contents for 83PL/CLM/1L1/V - 83 Plus Calc
Page 407: ...TI 83 Plus Inferential Statistics and Distributions 404 Input Calculated results Drawn results...
Page 412: ...TI 83 Plus Inferential Statistics and Distributions 409 Data Stats Input Calculated results...
Page 454: ...TI 83 Plus Applications 451 tvm_FV tvm_FV computes the future value tvm_FV PV PMT P Y C Y...
