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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
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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
2 5 0 3 2
X
1
=25032
ø
FIX STAT DEG
$
4 6
I
5 5
Y
1
=46.55
ø
FIX STAT DEG
$
1 3 5 9 6
$
4 1
I
7 7
$
8 1 8 2
$
1 5
I
9 9
Y
3
=15.99
ø
FIX STAT DEG
$
3 4 9 6
$
7
I
4 8
$
4 2 4
$
3
I
3 5
Y
5
=3.35
ø
FIX STAT DEG
