Consider the data from the repeated measures design shown in Table 9.10. (a) Fit a multivariate model

Question:

Consider the data from the repeated measures design shown in Table 9.10.

(a) Fit a multivariate model using the lm function and then use the Anova function in the car package to compute the sphericity test (as shown in Section 9.6.1) and determine if the Huynh-Feldt condition holds.

(b) From the output of the Anova function used in

(a) examine the Greenhouse-Geisser and Huynh-Feldt adjusted F-tests of the sub-plot e ects (are they signi cant?).

(c) Do you nd more terms signi cant using the adjusted F-tests than were found using the growth curve analysis shown in the text? If so, explain why.

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Related Book For  book-img-for-question

Design And Analysis Of Experiments

ISBN: 9780471661597

6th International Edition

Authors: Douglas C. Montgomery

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