Question 3 3.1 STA3701/012/0/2022 The following is a data set that was collected on the yield of a chemical experiment. In this [16] experiment, temperature, concentration and length of agitation were set by the experimenter. Rapid calce andratic for 22 Yield (y) Temperature (x,) Concentration (X2) Time (X3) rks on mat 33 10 20 36 10 40 20 33 15 40 20 26 15 40 20 37 10 25 15 37 25 10 50 40 20 10 50 20 42 15 45 15 50 39 10 42 10 50 45 15 50 25 47 15 50 25 Carefully consider the results given below that were obtained from the data and answer the questions that follow: 14 175 640 310 X'X = 175 2275 8000 3875 640 8000 29600 14200 310 3875 14200 6950 11.986 -0.143 -0.115 -0.220 -0.143 0.011 O 0 (XX)-1 -0.115 0.003 -0.001 -0.220 -0.001 0.012 524 X'YE 6665 and e'e = 96.5571 24330 11660 Test, at 5% level of significance, the hypothesis Ho: 281 + 382 + 83 = 6. (8) 3.1 (8) 3.2 Give a 95% confidence interval for 281 + 382 + B3 - Grand total: [501