Case Study 1-Way ANOVA

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Case Study1-Way ANOVA

• Yields of Entozoic Amoebae Under 5 Methods of
  Innoculation
• GriffinMcCarten(1949). The Journal of
  Parasitology. Vol.35,2,pp.193-198

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Description

• 5 Methods of Innoculation (Conditions)
• None (Control)
• Heat at 70C for 10 minutes
• Addition of 10 Formalin
• Heat followed by Formalin
• Formalin, followed after 1 hour by heat
• n10 Replicates per Condition (N50)
• YYield (10-4)

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Data
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(No Transcript)
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Group Means/SDs and Sums of Squares
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Analysis of Variance and F-test
H0 m1 m2 m3 m4 m5 (No differences in
condition effects) HA Not all mi are equal
(Differences Among Condition Effects)
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Diagnostics - Tests of Equal Variances
Levenes Test
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Diagnostics - Normality Assumption
Histogram Approximately bell-shaped
Normal Probability Plot Approximates a straight
line
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Kruskal-Wallis Test
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Post-Hoc Comparisons (I)
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Post-Hoc Comparisons (II)
Fishers LSD m1 gt m2 , m1 gt m3 , m1 gt m4 , m1 gt
m5 Tukey, Bonferroni m1 gt m2 , m1 gt m3 , m1 gt m5