Description Format Author(s) Source Examples

This example is taken from Table 3 of Crowder (1978), and concerns the proportion of seeds that germinated on each of 21 plates arranged according to a 2 by 2 factorial layout by seed and type of root extract.

A data frame with 21 observations (denoting plates) on the following 4 variables.

- r
the number of germinated seeds.

- n
the number of total seeds.

- x1
seed type.

- x2
root type.

Dimitris Rizopoulos d.rizopoulos@erasmusmc.nl

Crowder, M. (1978) Beta-Binomial ANOVA for proportions. *Applied Statistics*, 35, 34–37.

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