The experiment in Exercise 11.56 might have been conducted more effectively using a randomized block design with people as blocks, since you would expect mean reaction time to vary from one person to another. Hence, four people were used in a new experiment, and each person was subjected to each of the five stimuli in a random order. The reaction times (in seconds) are listed here:

Excel output for Exercise 11.59

a. Use the Excel printout to analyze the data and test for differences in treatment means.
b. Use Tukey's method of paired comparisons to identify the significant pairwise differences in the stimuli.
c. Does it appear that blocking was effective in this experiment?

Transcribed Image Text:

E-5664 D0010 u_C_ 0 1 29 B8608 A7696 s1234 ANOVA: Two-Factor Without Replication SUMMARY Count 4 4 4 4 4 Sum 2.8 3.2 Average 0.7 0.8 1.05 1.025 0.525 arlance 0.02 0.0267 0.0167 0.0025 0.009 2.1 ANOVA Source of Variation SS Rows df MS P-value F crit 3 0.046667 6.588 0.007 3.490 0.787 4 0.196750 27.776 0.000 3.259 0.14 0.085 12 0.007083 1.012 19 Total