=+The 100 students were assigned randomly into four groups and each student received a letter asking her to come for an interview as a prospective member of the club. At each interview, the goals and membership requirements were outlined and the student was asked to rank on a 10-point scale how eager she was to join the club described (1 ¼ most eager, 10 ¼ least eager). The students in group I were told about type I club, group II about type II, group III about type III, and group IV about type IV, in order to make recording the data easier. The data for the ratings of the 100 students are shown below.