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F-test

Introduction

Execute F-test, which checks the difference of variances between groups.

How to Access?

You can access from 'Add' (Plus) button.

How to Use?

Column Selection

  • Value Column - Numeric column whose variances is calculated.
  • Group Column - Label column of 2 groups.

Parameters

  • Population Variance Ratio (Optional) - The default is 1. The hypothesized population variances ratio.
  • Type of Alternative Hypothesis (Optional) - The default is "two.sided". What kind of alternative hypothesis to be used. This can be
    • "two.sided"
    • "less"
    • "greater"
  • Confidence Level (Optional) - The default is 0.95. The level of confidence interval.
  • Subset (Optional) - a vector to specify a subset of observations to be used.
  • NA Action (Optional) - The default is "na.fail". This changes the behaviour of NA data. Can be one of the following.
    • "na.omit"
    • "na.fail"
    • "na.exclude"
    • "na.pass"
    • NULL
Take a look at the reference document for the 'var.test' function from base R for more details on the parameters.
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T-test
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Chi-square test
Last modified 2yr ago