OpenStax - Ch. 13 F Distribution and One-Way ANOVA Flashcards

1
Q

Analysis of Variance

A

also referred to as ANOVA, is a method of testing whether or not the means of three or more populations are equal. The method is applicable if:

  • all populations of interest are normally distributed.
  • the populations have equal standard deviations.
  • samples (not necessarily of the same size) are randomly and independently selected from each population.
  • The test statistic for analysis of variance is the F-ratio.
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2
Q

One-Way ANOVA

A

a method of testing whether or not the means of three or more populations are equal; the method is applicable if:

  • all populations of interest are normally distributed.
  • the populations have equal standard deviations.
  • samples (not necessarily of the same size) are randomly and independently selected from each population.
  • there is one independent variable and one dependent variable.
  • The test statistic for analysis of variance is the F-ratio.
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3
Q

Variance

A

mean of the squared deviations from the mean; the square of the standard deviation. For a set of data, a deviation can be represented as x – x¯x¯ where x is a value of the data and x¯x¯ is the sample mean. The sample variance is equal to the sum of the squares of the deviations divided by the difference of the sample size and one.

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