(Data file: d waste) An experiment was conducted to study O2UP, oxygen uptake in milligrams of oxygen per minute, given five chemical measurements (Moore, XXXXXXXXXXThe data were collected on samples...

(Data file: d waste) An experiment was conducted to study O2UP, oxygen uptake in milligrams of oxygen per minute, given five chemical measurements (Moore, 1975). The data were collected on samples of dairy wastes kept in suspension in water in a laboratory for 220 days. All observations were on the same sample over time. We desire an equation relating log(O2UP) to the other variables. The goal is to find variables that should be further studied with the eventual goal of developing a prediction equation; Day cannot be used as a predictor. Complete the analysis of these data, including a complete diagnostic analysis. What diagnostic indicates the need for transforming O2UP to a logarithmic scale?