cottonbolls: Cotton Bolls data set

Description Usage Format Source References Examples

Description

This data set gives the observed number of bolls produced by the cotton plants at five growth stages: vegetative, flower-bud, blossom, fig and cotton boll; to examine the effect of five defoliation levels (0\

Usage

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Format

A data frame with 125 observations on 4 variables.

nc

number of bolls produced by two cotton plants at harvest

stages

growth stage

def

artificial defoliation level

def2

square of def

Source

Supplementary Content of Zeviani et al. (2014): http://www.leg.ufpr.br/doku.php/publications:papercompanions:zeviani-jas2014

References

Zeviani, W.M., Riberio P.J. Jr., Bonat, W.H., Shimakura S.E. and Muniz J.A. (2014). The Gamma-count distribution in the analysis of experimental underdispersed data. Journal of Applied Statistics 41, 2616–26.

Examples

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### Huang (2017) Page 373--375: Underdispersed Cotton bolls data
### Model fitting for predictor V 

data(cottonbolls)
M.bolls <- glm.cmp(nc~ 1+stages:def+stages:def2, data= cottonbolls)
M.bolls
summary(M.bolls)

mpcmp documentation built on Oct. 26, 2020, 9:07 a.m.