Table 1.3 The following figures, released by the Federal Trade Commission, show the milligrams of tar and nicotine found in 10 brands of cigarettes.

Brand Tar Content Nicotine Content

Viceroy 14 0.9

Marlboro 17 1.1

Chesterfield 28 1.6

Kool 17 1.3

Kent 16 1.0

Raleigh 13 0.8

Old Gold 24 1.5

Philip Morris 25 1.4

Oasis 18 1.2

Players 31 2.0

Calculate the rank correlation coefficient(in 2 decimal places) to measure the degree of relationship between tar and nicotine content in cigarettes.