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?
Answer to relevant QuestionsUsing the data in Exercise 16.2, calculate MSerror directly rather than by subtraction and show that this is the same answer you found in that exercise. What effect does smoking have on performance? Spilich, June, and Renner (1992) asked nonsmokers (NS), smokers who had delayed smoking for three hours (DS), and smokers who were actively smoking (AS) to perform a pattern ...Now we will expand on the analysis of Exercise 16.2. (a) Run a one-way analysis of variance on treatments 1 and 3 combined (n 5 20) versus treatments 2 and 4 combined. What question are you answering? (b) Why might your ...Use simple effect procedures to compare low-birth-weight and normal-birth-weight conditions for multiparous mothers. (Do this by recalculating the error term rather than using MSerror from the complete experiment.) Plot the means for the data in Exercise 17.1 to show what the data have to say. In Exercise 17.1
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