A study in the Academy of Management Journal (Oct. 2007) investigated how rude behaviors influence a victim's task performance. College students enrolled in a management course were randomly assigned to one of two experimental conditions: rudeness condition (45 students) and control group (53 students). Each student was asked to write down as many uses for a brick as possible in five minutes; this value (total number of uses) was used as a performance measure for each student. For those students in the rudeness condition, the facilitator displayed rudeness by berating the

students in general for being irresponsible and unprofessional (due to a late-arriving confederate). No comments were made about the late-arriving confederate for students in the control group. The number of different uses of a brick for each of the 98 students is shown in the table. Conduct a statistical analysis (at a = .01) to determine if the true mean performance level for students in the rudeness condition is lower than the true mean performance level for students in the control group. Use the results shown on the accompanying SAS printout to draw your conclusion

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Control Group: 1 24 5 16 21 7 20 1 9 20 19 10 23 16 0 4 9 13 12 11 10 13 11 3 6 10 13 16 12 28 19 12 20 3 11 Rudeness Condition: 4 11 18 11 9 6 5 11 9 12 7 5 7 3 11 1 9 11 10 7 8 9 10 7 11 4 13 5 4 7 8 3 8 15 9 16 10 0 7 15 13 9 2 13 10 Sanple Stat istics Group Mean Std. Dev. Std. Error Control Rude 53 11.81132 45 8.511111 7.3826 3.9922 1.0141 0.5951 Hypothes is Test Null hypothesis: Alternative : Mean ! - Mean 2 - 0 Mean 1 - Mean 2 > 0 If Variances Are t statistic Df Pr >t Equal Not Equal 2.683 2.807 96 82.43 0.0043 0.0031 95% Conf idence Interval for the Difference betueen Two Means Lover Linit Upper Linit 0.86 5.74