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2-Factor ANOVA Impact on Lacrosse Helmets

2-Factor ANOVA Impact on Lacrosse Helmets. S.V. Caswell, R.G. Deivert (2002). “Lacrosse Helmet Designs and the Effects of Impact Forces”, Journal of Athletic Training, 37(2):164-171. Data Description. Response: Gadd Severity Index (Higher scores = more severe) Factor A: Model (a=4 Levels)

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2-Factor ANOVA Impact on Lacrosse Helmets

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  1. 2-Factor ANOVAImpact on Lacrosse Helmets S.V. Caswell, R.G. Deivert (2002). “Lacrosse Helmet Designs and the Effects of Impact Forces”, Journal of Athletic Training, 37(2):164-171.

  2. Data Description • Response: Gadd Severity Index (Higher scores = more severe) • Factor A: Model (a=4 Levels) • Sports Helmets Cascade (i=1) • Sports Helmets Cascade Air Fit (i=2) • Sports Helmets Ultralte (i=3) • Bacharach Ultralte (i=4) • Factor B: Side (b=2 Levels) • Front (j=1) • Back (j=2) • Replicates: n=10 per Treatment • Model:

  3. Data - Mean (SD)

  4. Data - Factor Level (Interaction) Plot

  5. ANOVA

  6. Post Hoc Comparisons (Model w/in Side) • MSE=25374, df=72 n=10, 4 Brands, 6 Pairs/Side Front 3 2 1 4 Back 1 2 3 4

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