Proportion of variability described by regression equation

Reference no: EM1318272

Q1) Following data illustrates U. S. production of motor vehicles versus tons of domestic steel shipped for motor vehicle manufacture.

year	x= US PRODUCTION OF MOTOR VECHILES	Y= TONS OF DOMESTIC STEEL
2000	12.83 MILLION	16.06 MILLION
2001	11.52	14.06
2002	12.33	14
2003	12.15	15.88
2004	12.02	13.86

i) Find out the least-squares regression line and calculate r.

ii) What proportion of the variability in steel shipments for motor vehicles is described by regression equation?

iii) In a year in which U. S. production of motor vehicles is 12.0 million, what would be prediction for number of tons of domestic steel used for vehicle production?

Reference no: EM1318272

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