# anova1f_3c: Compute power for a One Factor ANOVA with three levels and... In pwr2ppl: Power Analyses for Common Designs (Power to the People)

## Description

Compute power for a One Factor ANOVA with three levels and contrasts. Takes means, sds, and sample sizes for each group. Alpha is .05 by default, alternative values may be entered by user

## Usage

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15``` ```anova1f_3c( m1 = NULL, m2 = NULL, m3 = NULL, s1 = NULL, s2 = NULL, s3 = NULL, n1 = NULL, n2 = NULL, n3 = NULL, alpha = 0.05, c1 = 0, c2 = 0, c3 = 0 ) ```

## Arguments

 `m1` Mean of first group `m2` Mean of second group `m3` Mean of third group `s1` Standard deviation of first group `s2` Standard deviation of second group `s3` Standard deviation of third group `n1` Sample size for first group `n2` Sample size for second group `n3` Sample size for third group `alpha` Type I error (default is .05) `c1` Weight for Contrast 1 (default is 0) `c2` Weight for Contrast 2 (default is 0) `c3` Weight for Contrast 3 (default is 0)

## Value

Power for the One Factor ANOVA

## Examples

 ```1 2``` ```anova1f_3c(m1=80, m2=82, m3=82, s1=10, s2=10, s3=10, n1=60, n2=60, n3=60, c1=2, c2=-1, c3=-1, alpha=.05) ```

### Example output

```Power for contrast = 0.242
```

pwr2ppl documentation built on April 4, 2021, 9:06 a.m.