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Ti36eng1.doc TI-36X II Manual Linda Bower Revised:
01/10/03 10:47 AM Printed: 01/10/03 10:47 AM Page 37 of
48
³
Problem
The table below gives the Gross Domestic Product per
capita and the telephone density (main lines per 100
population) for several countries in a recent year.
Country
GDP/Cap. Tel. Den.
Austria $25032 46.55
Israel $13596 41.77
Argentina $ 8182 15.99
Brazil $ 3496 7.48
China $ 424 3.35
Using the LIN regression, find the equation representing
the best fit, in the form y=
a+bx
, where x=GDP/capita
and y=telephone density. Find the coefficient of
correlation. Use this equation to predict the telephone
density of a country with a GDP per capita of $10,695. If
a country has a telephone density of 5.68, what GDP
per capital would you expect this country to have?
%t
4
%f"V
7
25032
X
1
=25032
ø
$
46
I
55
Y
1
=46.55
ø
$
13596
$
41
I
77
$
8182
$
15
I
99
Y
3
=15.99
ø
$
3496
$
7
I
48
$
424
$
3
I
35
Y
5
=3.35
ø