1. Cocaine addiction can be difcult to overcome. Since addicts derive pleasure from the drug, one proposed aid is to provide an antidepressant drug to addicts trying to break their addiction. A 3-year study with 72 chronic cocaine users compared an antidepressant drug called desipramine with lithium and a placebo. (Lithium is a standard drug to treat cocaine addiction. A placebo is a tablet with no effects and tastes and looks like the antidepressant drug. It is used so that the effect of being in the study but not taking the antidepressant drug can be seen.) One-third of the subjects, chosen at random, received each treatment. Here are the results: Cocaine Relapse? _I_ __- Compare the effectiveness of the three treatments in preventing a relapse. Use percentages and draw a bar graph. Write a brief summary of your conclusions. The College Board finds that the distribution of students' SAT scores depends on the level of education their parents have. Children of parents who did not finish high school have SAT Math scores X, which are distributed with mean 445 and standard deviation 106. Scores of children of parents with graduate degrees have SAT Math scores Y, which are distributed with mean 566 and standard deviation 109. One college seeking to have a more equitable standard for evaluating applicant's SAT scores proposes to standardize the SAT scores of its applicants to a common scale for equity. Find positive numbers, a, b, c, and d, such that a + DX and c + (W both have mean 500 and standard deviation 100