In a study, nine tires of a particular brand were driven on a track under identi

Question

In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles) and the tread depth was measured after the drive. Tread depth is measured in “mils.” Here, 1 mil is 0.001 inch. The least-squares regression line was computed. The equation of the least-squares regression line is:

Tread depth = 360.64 11.39x (thousands of miles)

The least-squares line would predict that the tread depth of a tire driven 16 thousand miles would be

Select one:

a. 360.64 mils

b. 178.4 mils

c. -181,879 mils

d. 260.5 mils

Explanation / Answer

TREAD DEPTH = 360.64 - 11.39X, HERE X IS THE DISTANCE TRAVELLED

WE NEED TO GET THE TREAD DEPTH OF A TIRE WHEN THE TIRE HAS DRIVEN 16(IN THOUSAND) MILES

SO IT WILL BE

TREAD DEPTH = 360.64 - 11.39*(16) = 360.64 - 182.24 = 178.4

HENCE OPTION B IS CORRECT

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.