A research MD designs a study to examine the relationship
A research MD designs a study to examine the relationship between the dose of a drug and the cumulative urine volume (CUMVOL) for a drug being considered as a diuretic. The selected group of 24 patients yields the following results.
a. Plot the data in a scatterplot. Would a straight line be an appropriate model relating dose to CUMVOL?
b. Fit a regression model relating CUMVOL to dose.
c. Test for lack of fit of the model at the a = .05 level.
d. Estimate the mean value of CUMVOL for a dose level of 15 using a 95% confidence interval.
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