Sargent et al. (2007, Experiment 2A) randomly divided 125 students into three groups and gave them different instructions regarding the focus of the Implicit Association Test (IAT). The dependent variable is the score on the IAT. The data is summarized in Table 6.34.
(a) The letters in parentheses were provided by the authors. Means with the same letter were not significantly different. Provide a summary plot of the means, using lines to connect those that are not significantly different.
(b) Is there significant evidence that the instructions regarding focus affect the mean IAT score? Use α = 0:05.
(c) The authors state:
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