infer_ts_var_test: Two Sample Variance Comparison Test
In inferr: Inferential Statistics

Description Usage Arguments Value Deprecated Function References See Also Examples

infer_ts_var_test performs tests on the equality of standard deviations (variances).

infer_ts_var_test(
  data,
  ...,
  group_var = NULL,
  alternative = c("less", "greater", "all")
)

`data`	a `data.frame` or `tibble`
`...`	numeric; column(s) in `data`
`group_var`	factor; column in `data`
`alternative`	a character string specifying the alternative hypothesis, must be one of "both" (default), "greater", "less" or "all". You can specify just the initial letter.

infer_ts_var_test returns an object of class "infer_ts_var_test". An object of class "infer_ts_var_test" is a list containing the following components:

`f`	f statistic
`lower`	lower one-sided p-value
`upper`	upper one-sided p-value
`two_tail`	two-sided p-value
`vars`	variances for each level of the grouping variable
`avgs`	means for each level of the grouping variable
`sds`	standard deviations for each level of the grouping variable
`ses`	standard errors for each level of the grouping variable
`avg`	combined mean
`sd`	combined standard deviation
`se`	estimated combined standard error
`n1`	numerator degrees of freedom
`n2`	denominator degrees of freedom
`lens`	number of observations for each level of grouping variable
`len`	number of observations
`lev`	levels of the grouping variable
`type`	alternative hypothesis

var_test() has been deprecated. Instead use infer_ts_var_test().

Sheskin, D. J. 2007. Handbook of Parametric and Nonparametric Statistical Procedures, 4th edition. : Chapman & Hall/CRC.

var.test

# using grouping variable
infer_ts_var_test(hsb, read, group_var = female, alternative = 'less')

# using two variables
infer_ts_var_test(hsb, read, write, alternative = 'less')