Figure 4

Generalized additive model functions for ship SL.

For each frequency band model (A-G), functions shown are for the four variables with the most predictive power (Table 3). The rows are ordered according to predictive power (i.e., the first row are the predictors that had the highest predictive power in the step-wise model selection procedure). Functions are scaled relative to the model mean (note different y-axis scales). MTH and TONE were modeled as categorical variables; the width of each bar represents the sample size and dashed lines are two standard error bands.