A study of bone density on 5 random women at a hospital produced the following results....

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A study of bone density on 5 random women at a hospital produced the following results. Age 350 345 330 320 310 Bone Density

math Statistics-And-Probability

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Answer 1

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	Age,x	Bone density,y	xy	x^2	y^2
1	33	350	11550	1089	122500
2	37	345	12765	1369	119025
3	57	330	18810	3249	108900
4	61	320	19520	3721	102400
5	73	310	22630	5329	96100
Total	261	1655	85275	14757	548925

Correlation coefficient,r=(5*85275-261*1655)/SQRT((5*14757-261^2)*(5*548925-1655^2))

r=-0.991

There is strong,negative relationship between age and bone density.

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Answer 2

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