Rank the following three stocks by their risk-return relationship, best to worst. rail haul has an average return of 12 percent and standard deviation of 25 percent. the average return and standard deviation of idol staff are 15 percent and 35 percent; and of poker-r-us are 9 percent and 20 percent." before solving problem 6, calculate the coefficient of variation. ( show work)

Which one of the following statements is true? ddt does not prevent disease from passing from agricultural animals to humans. cost was a major factor in the united states government's decision to ban ddt. many african governments concluded that the potential long-term health effects of ddt were not as serious as the immediate problem of insect control. ddt cannot accumulate in the fat of animals. the ddt ban in the united states has made it very difficult to control agricultural insect pests.