There has been statistically significant, positive relationship between the number of charges filed against juveniles in criminal courts and the severity of the fine imposed (among those sentenced to pay fines). Some examples of the need to consider additional variables before making a decision about the trustworthiness of a bivariate relationship. What more would you want to know about juvenile defendants' cases in order to feel that you have a clear picture of the chargefine relationship? Identify and discuss the variables that you would add to this analysis.