Fifty male subjects drank a measured amount
x
(in ounces) of a medication and the concentration
y
(in percent) in their blood of the active ingredient was measured 30 minutes later. The sample data are summarized by the following information:
n=50,\Sigma x=112.5,\Sigma x^(2)=356.25
\Sigma y=4.83\Sigma y^(2)=0.667\Sigma xy=15.255
0<=x<=4.5
r=0.965
r=0.046
r=0.875
r=0.460
r=0.709