Part 1 After reading the assigned Chapter 10 in W answer the six questions at the end of the Chapter and copy your answers here (Beginning on page 285) (60 points) Part 2 You've done a case control study of the relationship of benzene exposure in factory workers and bladder cancer, and come up with the following 2x2 table: --_- ex osed --1 - cancer [5.2 _ Calculate the Odds Ratio. (10 points) OR= But exposure to benzene is uncertain in some of the jobs that workers performed. You learn later that 25% of those with bladder cancer had been misclassied as exposed and 30% of those with bladder cancer has been misclassied as not exposed. The same occurred for those without cancer. Reconstruct the table and calculate the Odds Ratio. (10 points) Has the OR been biased toward or away from the null? Explain. (5 points) Part 3 The company performs an audit of your work and finds that, indeed, 25% of those with bladder cancer were missclassified as exposed and 30 %of those with bladder bander had been misclassified as not exposed. HOWEVER, they were able to show that of those without cancer, 20% had been misclassified as exposed and only 10% of those without cancer had been misclassified as not exposed. Reconstruct the table and calculate the Odds Ratio. (10 points) Exposed Not exposed Bladder cancel No cancer OR = Has the OR been biased toward or away from the null? Explain. (5 points)