Repeated Measures ANOVA

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Repeated Measures ANOVA

• Rogaine for Hair Growth in Women
• V.H. Price and E. Menefee (1990). Quantitative
  Estimation of Hair Growth I. Androgenic Alopecia
  in Women Effect of Minoxidil, The journal of
  Investigative Dermatology, Vol.95, pp.683-687

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Data Description

• Subjects 8 Women with Androgenetic Alopecia
• Treatments Minoxidil (Rogaine) and Placebo (4
  Women per treatment)
• Time Periods Measurements made Pre-treatment (0
  weeks), 8, 16, 24, and 32 weeks (will only
  consider post-treatment measures)

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Data
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Statistical Model
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Sums of Squares
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ANOVA Table/F-Tests
Note We cannot conclude any treatment or time
effects or interaction at the 0.05 significance
level. The subject-to-subject variation is very
large, which makes finding a treatment effect
very difficult in this setting (and very few
subjects as well)
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Post-Hoc comparisons
Bonferronis method for illustration only (no
significant effects found from Analysis of
Variance)