An Experimental Psychologist Used 5 Different Methods to Teach Rats

question 103

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An experimental psychologist used 5 different methods to teach rats to run a maze. The ANOVA results are shown below along with the sample means. *With a = 0.01 F crit = 4.98, therefore reject H₀ . = 13.75, = 7.75 , = 13.25 , = 12.50 , = 5.75 (seconds)
a. Do a planned comparison test on the difference between group 2 and group 4. Are the results significant using a = 0.01 1 tail ? Assume equal n 's in each group.
b. Is group 2 different from group 4 using a = 0.01 with the HSD test?
c. Is group 2 different from group 4 using a = 0.01 with the Scheffé test?
d. Explain any differences in results between parts a, b and c.

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