Question 4 (2 points) You love fishing but are concerned at the levels of contaminants in fish in your local Kalamazoo River. As part of a study in monitoring levels of chemical contaminants in Carp fish in order to provide safe eating guidelines, you set about measuring levels of polychlorinated biphenyls (PCBs) in 5 randomly sampled fish caught in the Kalamazoo River. Data are summarized in the table below. Source: https://www.michigan.gov/mdhhs/0,5885,7-339-71548 54783_54784_54785_58671- 296074--,00.html Length (cm) PCBs (mg/kg) 35.8 7.6 30.5 5.8 18.1 43.1 4.1 9 47.2 12.3 * 34.94 Sx = 11.41 -7.76 Sy-3.14 Given that the correlation coefficient which relates length of the fish and PCB levels is r = 0.949, the regression equation that predicts PCB levels using fish length is A) PCB level = 32.92 +0.26*length of fish B) PCB level=32.92+3.44*length of fish C) Length of fish = 8.72+1.36*PCB level OD) PCB level -1.36 +0.26*length of fish E) Length of fish = 6.24 + 8.72*PCB level Question 3 (2 points) You love fishing but are concerned at the levels of contaminants in fish in your local Kalamazoo River. As part of a study in monitoring levels of chemical contaminants in Carp fish in order to provide safe eating guidelines, you set about measuring levels of polychlorinated biphenyls (PCBs) in 5 randomly sampled fish caught in the Kalamazoo River. Data are summarized in the table below. Source: https://www.michigan.gov/mdhhs/0,5885,7-339-71548 54783_54784_54785_58671- 296074--,00.html Length (cm) PCBs (mg/kg) 35.8 7.6 30.5 5.8 18.1 4.1 9 12.3 43.1 47.2 * 34.94 S=11.41 7.76 Sy-3.14 Given that the correlation coefficient which relates length of the fish and PCB levels is r = 0.949, what is the intercept of the regression equation that predicts PCB level using length of fish? A) 6.24 B) -1.36 C) -8.72 D) 32.92 E) 1.32