Bivariate analysis of association between average total cost and its components and eight explanatory variables.

Column definitions:(1) Variable definitions.(2) Specifies whether variable is continuous or discrete, and if discrete, the criterion used to define the dummy variable.(3) Mean value of the explanatory variable over all 45 observations. For discrete versions of the variables, the mean is the proportion of observations for which D = 1.(4) Standard deviation of the explanatory variables.(5) Correlation between a continuous explanatory variable and average total cost.(6) Mean value of average total cost for values of the dummy variable equal to zero.(7) Mean value of average total cost for values of the dummy variable equal to one.(8) p-value of the test of the null hypothesis of no relationship between the explanatory variable and average total cost.(9) – (12): Same definitions as (5) – (8), respectively, except for average on-site cost instead of average total cost.(13) – (16): Same definitions as (5) – (8), respectively, except for average off-site cost instead of average total cost.