Texas Instruments solar TI-36X User Manual page 39

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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.
Austria $25032
Israel $13596
Argentina $ 8182
Brazil $ 3496
China $ 424
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?
4
2 5 0 3 2
4 6 5 5
1 3 5 9 6 4 1 7 7
8 1 8 2 1 5 9 9
3 4 9 6 7 4 8 4 2 4
3 3 5
37
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
Problem
Tel. Den.
46.55
41.77
15.99
7.48
3.35
X =25032 ø
1
ø
Y =46.55
1
Y =15.99 ø
3
ø
Y =3.35
5