SOLUTION: The ages (in years) of seven people and the number of days they spent recovering in the hospital after surgery are given in the following table. Age, x 12 21 38 44 59 63 70 D

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Question 321023: The ages (in years) of seven people and the number of days they spent recovering in the hospital after surgery are given in the following table.
Age, x 12 21 38 44 59 63 70
Days in Hospital, y 4 6 7 5 9 11 12


Calculate the correlation coefficient, r.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

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+xave=43.85714+
yave=7.714286
SSXX=2850.857
SSYY=55.42857
SSXY=355.7143
b=SSXY%2FSSXX=0.125
b'=SSXY%2FSSYY=6.42
b*b'=r%5E2=0.801
r=sqrt%28r%5E2%29=0.895
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y=+0.125x%2B2.24+
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