Maryann is testing the effectiveness of a new acne medication. there are 100 people with acne in the study. fifty-five patients received the acne medication, and 45 other patients did not receive treatment. thirty of the patients who received the medication reported clearer skin at the end of the study. twenty-two of the patients who did not receive medication reported clearer skin at the end of the study. what is the probability that a patient chosen at random from this study took the medication, given that they reported clearer skin? 55% 58% 38% 43%

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.