Question: The concentration (in nanograms per millilieter) of plasma epinephrine were measured for 10 dogs under isofluorane, halothane, and cytopropane anesthesia; the measurements are given in the following table.

Dog Dog Dog Dog Dog Dog Dog Dog Dog Dog

1 2 3 4 5 6 7 8 9 10

Isofluorane .28 .51 1.00 .39 .29 .36 .32 .69 .17 .33

Halothane .30 .39 .63 .68 .38 .21 .88 .39 .51 .32

Cyclopropane 1.07 1.35 .69 .28 1.24 1.53 .49 .56 1.02 .30

(a) Do a parametric analysis using aov(). Be sure to include a histogram of the residuals and comment.

(b) Perform the three pairwise comparisons using Tukey's procedure.