5. Polychlorinated biphenyls (PCBs) are worldwide environmental contaminants of industrial origin that are related to DDT. They are being phased out in the United States, but they will remain in the environment for many years. An experiment is run to study the effects of PCB on the reproductive ability of screech owls. The purpose is to compare the shell thickness of eggs produced by birds exposed to PCB with that of birds not exposed to the contaminant. It is thought that shells of the former group will be thinner than those of the latter. Do these data support this research hypothesis ? Subject 1 2 3 4 No 5 6 7 8 Exposed Shell to PCB thickness(mm) Yes 0.21 No 0.22 Yes 0.223 0.265 Yes 0.25 No 0.217 No 0.2 Yes 0.19 No 0.23 Yes 0.2 No 0.27 No 0.18 Yes 0.226 Yes 0.215 Yes 0.24 No 0.187 No 0.256 Yes 0.136 9 10 11 12 13 14 15 16 17 18 Complete the appropriate test by hand. Verify your work by using SAS (attach your SAS code and output)