Question 7 (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 43.1 9 47.2 x=34.94 Sx = 11.41 12.3 y= 7.76 Sy = 3.14 Given that the correlation coefficient which relates length of the fish and PCB levels is r = 0.949, and using the predicted value and the RMS of the regression, there is a 95% chance that the actual PCB level in carp of 20cm falls between which two values. A) (5.13, 8.69) B) (2.89, 4.87) C) (0.91, 6.85) D) (1.88, 5.84) E) (2.64, 8.14) Question 8 (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 43.1 9 47.2 34.94 S=11.41 12.3 y = 7.76 Sy=3.14 Given that the correlation coefficient which relates length of the fish and PCB levels is r = 0.949, and using the predicted value and the RMS of the regression, there is a 99.7% chance that the actual PCB level of carp of 20 cm falls between which two values. A) (4.47, 10.31) B) (5.13, 8.69) C) (1.90, 5.86) D) (2.89, 4.87) E) (0.89, 6.83)