Cocaine use produces shortterm feelings of physical and mental wellbeing followed by feelings of tiredness and depression when the dose wears off. The cycle of positive and negative feelings can make cocaine addiction very hard to break.Perhaps a medication that reduces depression would help cocaine addicts overcome their addiction.A sixweek study solicited participation of 72 chronic cocaine users who wanted to stop using cocaine. Twenty four were randomly assigned to each of three treatments: desipramine (an antidepressant), lithium (a standard treatment for cocaine addiction) and a placebo.All treatments were taken in tablet form and the tablets were prepared to look identical.At the conclusion of the study participants were classified according to whether or not they had relapsed (resumed using cocaine). The research question is, "Is there a difference in relapse rate between the three treatments?" (a) Complete the following statement by choosing ONE option from each of columns 14 below.If you think more than one answer may be possible, choose the best answer. [4] Statement: "The research question concerns the..." 1234 comparison ofmultiplecategoricalmean(s) distribution ofonenumericalmedian(s) relation betweentwopopulationproportion(s) value ofsamplevariable(s) (b) Write hypothesis statements for the relevant hypothesis test, defining any symbols used for population parameters. [