## Averages by block of yields for the Antigua Corn data

### Description

These data frames have yield averages by blocks (parcels). The
`ant111b`

data set is a subset of this.

### Usage

antigua

### Format

A data frame with 324 observations on 7 variables.

- id
a numeric vector

- site
a factor with 8 levels.

- block
a factor with levels `I`

`II`

`III`

`IV`

- plot
a numeric vector

- trt
a factor consisting of 12 levels

- ears
a numeric vector; note that -9999 is used as a missing value code.

- harvwt
a numeric vector; the average yield

### Source

Andrews DF; Herzberg AM, 1985. Data. A Collection of Problems from
Many Fields for the Student and Research Worker. Springer-Verlag.
(pp. 339-353)