Darley and Latané (1968) recorded the speed with which participants summoned help for a person in trouble. Some participants thought that they were alone with the person (Group 1, n 5 13), some thought that one other person was there (Group 2, n 5 26), and others thought that four other people were there (Group 3, n 5 13). The dependent variable was speed (1/time 3 100) to call someone for help. The mean speed scores for the three groups were 0.87, 0.72, and 0.51, respectively. The MSerror was 0.053. Reconstruct the analysis of variance. What would you conclude?

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