The ANOVA Procedure

# The ANOVA Procedure - One-Way Analysis of Variance (ANOVA)...

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One-Way Analysis of Variance (ANOVA) ANOVA – a statistical procedure to test hypotheses concerning the means of three or more treatment conditions (or populations) in an experiment. The ANOVA provides a test of the null statistical hypothesis (H 0 ) that the population means for three or more groups are equal against the alternative hypothesis (H 1 ) that at least one of the population’s means differs significantly from all the others. In other words, that there was a treatment effect as a result of the experiment. Consider the following hypothetical experiment on the effects of alcohol on maze running in rats. The 247 rats in this lab had a mean maze completion time of 5.4 minutes. The scores in Table 1 show the time in minutes for 50 randomly selected rats in five treatments to complete the maze. What happened with Condition 5? Should you include it? Steps: Work in groups and do each step with a calculator to see if you get the same answers as other groups along the way. 1.

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## This note was uploaded on 04/21/2011 for the course BIO 105 taught by Professor Staff during the Winter '08 term at Grand Valley State.

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The ANOVA Procedure - One-Way Analysis of Variance (ANOVA)...

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