The residual: In statistics, we learn that the residual is the leftover-the unexplained. The concept of a residual or leftover unexplained portion of a puzzle emerges in standardized reading passages. Consider a passage in which the author describes an audience who sees scientific evidence for a cancer treatment but does not express support for the treatment. What is left unexplained. 1. What would lead the audience to express support if scientific evidence does not? 2. What is the effect of scientific evidence if it does not yield support from an audience-does it lead to indifference or opposition?