Texas Instruments MathPrint TI-30X Plus - Page 24

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Press > to scroll across to the top of L2.
Enter the humerus bone lengths in L2.
Start by entering
71
and pressing ] (or
n).
Press q † to access the
statistics menu.
METHOD 1:
Press 3 to access 2-Var Stats.
Select L1 for xDATA and select L2 for
yDATA.
Press  to highlight CALC and press
n.
(a)
Scrolling up or down we obtain:
1.196...a =
and
3.856...b =−
The least-squares regression line is
1.20 3.86yx=−
(2 dp).
(b)
In StatVars, scroll up or down to locate

(y
and press n.
Enter
48
and press  n.
Hence, correct to the nearest centimetre,
the humerus bone length is estimated to
be
54
cm.