Interpret the results in Exercise 12.20. Using the data in Epineq.dat, compute both the linear and quadratic trend tests on the three drug dosages. Do this separately for each of the three intervals....

Interpret the results in Exercise 12.20.

Using the data in Epineq.dat, compute both the linear and quadratic trend tests on the three drug dosages. Do this separately for each of the three intervals. (Hint: The linear coefficients are [20.597110, 20.183726, 0.780836], and the quadratic coefficients are [0.556890, 20.795557, 0.238667].)