Set up a notional model of a research issue you choose and draw a chart similar to Figure 4.7a, that has:

Data in Figure 4.7a

(a) At least one mediating factor that should not be controlled for (similar to the height of the lemon tree); and 

(b) One variable that is not a mediating factor and should be controlled for (similar to the variable for the “good soil part of the yard”).

Transcribed Image Text:

Amount of water (W) (+) (+) L=Bo+B\W+B,Gi+ Height (H) Other indicators of health "Good soil" part of yard (G) (+) (+) (M1) M2 #lemons (L)