anovaSummarized {CarletonStats} R Documentation

## Anova F test

### Description

ANOVA F test when given summarized data (sample sizes, means and standard deviations).

### Usage

```anovaSummarized(N, mn, stdev)
```

### Arguments

 `N` a vector with the sample sizes `mn` a vector of means, one for each group in the sample `stdev` a vector of standard deviations, one for each group in the sample

### Details

Perform an ANOVA F test when presented with summarized data: sample sizes, sample means and sample standard devations.

### Value

Returns invisibly a list

 `Treatment SS` The treatment sum of squares (also called the "between sum of squares"). `Residual SS` Residual sum of squares (also called the "within sum of squares"). `Degrees of Freedom` a vector with the numerator and denominator degrees of freedom. ```Treatment Mean Square``` Treatment SS/numerator DF `Residual Mean Square` Residual SS/denominator DF `Residual Standard Error` Square root of Residual Mean Square `F` the F statistic `P-value` p-value

...

Laura Chihara

### Examples

```
#use the data set chickwts from base R
head(chickwts)

N <- table(chickwts\$feed)
stdev <- tapply(chickwts\$weight, chickwts\$feed, sd)
mn <- tapply(chickwts\$weight, chickwts\$feed, mean)

anovaSummarized(N, mn, stdev)

```

[Package CarletonStats version 2.0 Index]