Texas Instruments TI-36X manual ³Problem, GDP/Cap, t 4 %fV

³Problem

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?
%t4 %f"V		X.1:=256)6032,-/	ø
72 5 0 3 2
$4 6 I5 5		Y.=4656)6.55 ,-/	ø
		1:
$1 3 5 9	6 $4 1 I7 7	Y.31:=1556)6.99 ,-/	ø
$8 1 8 2	$1 5 I9 9
$3 4 9 6	$7 I4 8 $4 2 4	Y.51:=3.56)635 ,-/	ø

$3 I3 5

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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