Doctors Studying How the Human Body Assimilates Medication Inject Some $\quad$

Doctors studying how the human body assimilates medication inject some patients with penicillin,and then monitor the concentration of the drug (in units/cc)in the patients' blood for seven hours.The researchers try model,using the re-expression log(Concentration).Examine the regression analysis and the residuals plot below.Explain why you think this model is appropriate. Dependent variable is: $\quad$ LogCnn
No Selector
R squared $= 98.0 \% \quad$ R squared (adjusted) $= 98.0 \%$
$s = 0.0451$ with $43 - 2 = 41$ degrees of freedom
$\begin{array} { l l r r r } \text { Source } & \text { Sum of Squares } & \text { df } & \text { Mean Square } & \text { F-ratio } \\ \text { Regression } & 4.11395 & 1 & 4.11395 & 2022 \\ \text { Residual } & 0.083412 & 41 & 0.002034 & \end{array}$

$\begin{array} { l l l l l } \text { Variable } & \text { Coefficient } & \text { s.e. of Coeff } & \text { t.ratio } & \text { prob } \\ \text { Constant } & 1.80184 & 0.0168 & 107 & \text { Š } 0.0001 \\ \text { Time } & - 0.172672 & 0.0038 & - 45.0 & \text { S.0.0001 } \end{array}$