1. In your homework, you worked a problem dealing with the effect of temperature and stirring rate on the yield of a certain product. The process was run 16 times, at the settings indicated below. The units for eld are in percent of theoretical maximum. Temp. C Stirring Rate (rpm) Yield (96) 110 30 70.27 110 32 72.29 111 34 72.57 111 36 74.69 112 38 76.09 112 40 73.14 114 42 75.61 114 44 69.56 117 46 74.41 117 48 73.49 122 50 79.18 122 52 75.44 130 54 81.71 130 56 83.03 143 58 76.98 143 60 80.99 Correlations are: - Correlation between temperature and yield, r = 0.7323 - Correlation between stirring rate and temperature, r = 0.906 - Correlation between stirring rate and yield, r = 0.751 What do the correlations suggest about what variable(s) is/are associated with increasing yield. Is there any evidence of confounding