Texas Instruments MathPrint TI-30X Plus Quick Manual page 25

METHOD 2:
Press q † to access the
statistics menu.
Press 4 to access LinReg a
Select the options as shown at right.
Press  to highlight CALC and press
n.
(a)
and
The least-squares regression line is
(2 dp).
(b)
Press a 2 and enter
Press ) n.
Hence, correct to the nearest centimetre,
the humerus bone length is estimated to
54
be cm.
Example
A Mathematics test consists of 10 multiple choice questions each of which has five possible
answers. A student makes a random guess at each of the questions.
Use the TI-30X Plus MathPrint™ to find the probability that they guess five correct answers.
Give your answer correct to four decimal places.
Keystrokes and solution:
X
Let represent the number of correct
X ~ Bin 10,0.2
answers and
x
+b.
.
( )
.
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