1. Plants emit gases that trigger the ripening of fruit, attract pollinators, and cue other physiological responses. A group of researchers examined factors that affect the emission of volatile compounds by the potato plant Solanum tuberosum. The volatile compounds analyzed were hydrocarbons used by other plants and animals. Researchers used plant weight (in grams) to predict to the quantity of volatile compounds emitted (in hundreds of nanograms). Assume all necessary conditions for making inferences are satisfied. 4 Bivariate Fit of volatile emissions By plant weight -Linear Fit Linear Fit 20 volatile emissions = -1.379849 + 0.2577847*plant weight 4 Summary of Fit RSquare 0.242983 15 RSquare Adj 0.158871 volatile emissions Root Mean Square Error 5.311016 Mean of Response 15.56364 10 Observations (or Sum Wgts) 11 D Lack Of Fit Analysis of Variance 5 Sum of Source DF Squares Mean Square F Ratio 50 60 70 80 90 Model 81.48340 81.4834 2.8888 plant weight Error 9 253.86206 28.2069 Prob > F C. Total 10 335.34545 0.1234 Parameter Estimates Term Estimate Std Error t Ratio Prob>/t| Intercept -1.379849 10.09666 -0.14 0.8943 plant weight 0.2577847 0.15167 1.70 0.1234a) Provide an appropriate estimate the amount the volatile compounds emitted will change for every one gram increase in plant weight. SAVE YOUR RESULTS OFTEN! b) Based ONLY on the estimate in (a), is plant weight a useful predictor of amount of volatile compounds emitted? Explain. SAVE YOUR RESULTS OFTEN