25
We need to find
(
)
5
P X
=
.
Press
q
†
>
to access the
probability distributions menu.
Press
(or scroll down) to select
Binomialpdf
.
Select
SINGLE
and press
]
.
Enter the required values for
,
n p
and
x
as
shown at right.
Press
to highlight
CALC
and press
n
.
So
(
)
5
0.0264
P X
= =
(4 dp).
Note:
If you need to use
Binomialpdf
again, press
]
to highlight
SOLVE AGAIN
and press
n
. Otherwise highlight
QUIT
and press
n
. If your probability is
required in a further calculation, it can be
stored to a variable.
Example
If
X
has a normal distribution with mean
28
=
and standard deviation
1.7
=
, find
(
)
32
P X
. Give your answer correct to four decimal places.
Keystrokes and solution
:
(
)
2
~ N 28,1.7
X
Press
q
†
>
to access the
probability distributions menu.
Press
2
to select
Normalcdf
.
Enter the required values for
and
.
Ensure that the lower bound is a large
negative number, for example
-1E99
, and
enter
32
for the upper bound.
Press
to highlight
CALC
and press
n
.
Summary of Contents for MathPrint TI-30X Plus
Page 27: ...26 So 32 0 9907 P X 4 dp...
