# confIntOmegaSq

##### Confidence intervals for Omega Squared

This function used the MBESS function `conf.limits.ncf`

and `convert.ncf.to.omegasq`

to compute the point estimate and confidence interval for Omega Squared.

- Keywords
- bivar

##### Usage

`confIntOmegaSq(var1, var2, conf.level = 0.95)`

##### Arguments

- var1, var2
- The two variables: one should be a factor (or will be made a factor), the other should have at least interval level of measurement. If none of the variables is a factor, the function will look for the variable with the least unique values and change it into a factor.
- conf.level
- Level of confidence for the confidence interval.

##### Value

- A

`confIntOmegaSq`

object is returned, with as elements:##### Note

Formula 16 in Steiger (2004) is used for the conversion in `convert.ncf.to.omegasq`

.

##### References

Steiger, J. H. (2004). Beyond the F test: Effect size confidence intervals and tests of close fit in the analysis of variance and contrast analysis. Psychological Methods, 9(2), 164-82. https://doi.org/10.1037/1082-989X.9.2.164

##### Examples

```
confIntOmegaSq(mtcars$mpg, mtcars$cyl);
```

*Documentation reproduced from package userfriendlyscience, version 0.5-2, License: GPL (>= 2)*

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