Table 5. Two-way ANCOVA (analysis of covariance) results for ppERK AUC versus stimulation characteristics (ITI) and type (combination versus summation) as factors (N = 5 in each group).

	cAMP+Giβγ+calcium
	0.5 µM ca	18% PP1	50% PP1
F (2,47)	43.56	28.28	3.99
P (ITI)	<0.0001	<0.0001	0.023
T (ITI)	9.11	6.43	2.36
P (type)	0.05	<0.0001	0.13
T (type)	−2.04	−3.90	−1.56
Conclusion	Significant for stim only	Significant for both type and stim	Significant for stim only