A medical researcher wanted to study the effect of zinc lozenges on cold symptoms. Of the 20 people in the study, 10 were randomly assigned to take 4 zinc lozenges per day for ve days, while the other 10 participants took 4 placebo lozenges per day for the same amount of time. For each participant, the duration of the cold [in it of days] was recorded. The research question is: is there evidence of a difference in average cold duration {in days} between those who take zinc lozenges and those who take the placebo? Bootstrap condence interval only Randomization test only.r Either a randomization or ttest may be used Either a bootstrap or tlnterval may.r be used