This data set contains information about the abundance and distribution of trichostrongyloid eggs in the faeces of 14 groups of commercially farmed sheep given in Table 1 in Morgan et al. (2005). The faecal egg counts were assumed to follow a negative binomial distribution with mean m and overdispersion parameter k.
A data frame with 14 rows and 13 variables
The data set has columns:
|group||ID number for the groups|
|ageclass||age class of sheep: "Lambs" or "Ewes"|
|month||month when samples were taken|
|n||number of sheep in group|
|meanFEC||mean number of eggs per gram (epg) of faeces|
|k||estimated overdispersion parameter k|
|k.low||lower limit of a 95% confidence interval for k|
|k.up||lower limit of a 95% confidence interval for k|
|maxFEC||maximal number of eggs per gram of faeces per group|
|percentageLarger1000||percentage of samples with more than 1000 epg|
|Chi2||goodness-of-fit statistic for the negative binomial distribution|
|df||corresponding degrees of freedom|
Morgan ER, Cavill L, Curry GE, Wood RM, Mitchell ESE (2005). Effects of aggregation and sample size on composite faecal egg counts in sheep, Veterinary Parasitology, 121:79-87.
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