An experiment investigated the release of the hormone ACTH from ratpituitary glands under eight treatments: the factorial combinations of CRF (0 or 100 nM; CRF is believed to increase ACTH release), calcium (0 or 2 mM of CaCl2), and Verapamil (0 or 50 µM; Verapamil is thought to block the effect of calcium). Thirty-six rat pituitary cell cultures are assigned at random to the factor-level combinations, with control (all treatments 0) getting 8 units, and other combinations getting 4. The data follow (Giguere, Lefevre, and Labrie 1982). Analyze these data and report your conclusions.
