Texas Instruments MathPrint TI-30X Plus - Page 26

25
We need to find
( )
5PX=
.
Press q † > to access the
probability distributions menu.
Press  (or scroll down) to select
Binomialpdf.
Select SINGLE and press ].
Enter the required values for
,np
and
x
as
shown at right.
Press  to highlight CALC and press
n.
So
( )
5 0.0264PX==
(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
( )
32PX
. Give your answer correct to four decimal places.
Keystrokes and solution:
( )
2
~ N 28,1.7X
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.