Three groups of college students, 20 in each group, are given a list of eight nonsense syllables and required to learn the order in which the syllables appeared, by calling out the second syllable on the list when they were shown the first syllable, calling out the third syllable when they were shown the second, and so on. Group 1 is given 1 s in which to anticipate the next syllable, Group 2 is given 3 s, and Group 3 is given 6 s. Presentation of the lists of nonsense syllables continues until the person correctly anticipates all eight syllables. The dependent variable is the number of times (trials) the list of syllables has to be presented until the person correctly anticipates all eight syllables. Here are the results:

a. Complete the ANOVA summary table.

b. From the F table, what is the critical value of F at the .05 error level?

c. What level of confidence can you have in rejecting the null hypothesis? Conversely, if you reject the null hypothesis, what is the probability that you have made a Type I error?

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Source Between Within Total SS 85.37 257.06 df MS F