Number of ticks on the heads of red grouse chicks sampled in the field (grouseticks) and an aggregated version (grouseticks_agg); see original source for more details
● Data Source:
CranContrib
● Keywords: datasets
● Alias: grouseticks, grouseticks_agg
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Data on genetic variation in responses to fertilization and simulated herbivory in Arabidopsis
● Data Source:
CranContrib
● Keywords: datasets
● Alias: Arabidopsis
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Dyestuff
(Package: lme4) :
Yield of dyestuff by batch
The Dyestuff data frame provides the yield of dyestuff (Naphthalene Black 12B) from 5 different preparations from each of 6 different batchs of an intermediate product (H-acid). The Dyestuff2 data were generated data in the same structure but with a large residual variance relative to the batch variance.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: Dyestuff, Dyestuff2
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sleepstudy
(Package: lme4) :
Reaction times in a sleep deprivation study
The average reaction time per day for subjects in a sleep deprivation study. On day 0 the subjects had their normal amount of sleep. Starting that night they were restricted to 3 hours of sleep per night. The observations represent the average reaction time on a series of tests given each day to each subject.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: sleepstudy
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InstEval
(Package: lme4) :
University Lecture/Instructor Evaluations by Students at ETH
University lecture evaluations by students at ETH Zurich, anonymized for privacy protection. This is an interesting “medium” sized example of a partially nested mixed effect model.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: InstEval
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Pastes
(Package: lme4) :
Paste strength by batch and cask
Strength of a chemical paste product; its quality depending on the delivery batch, and the cask within the delivery.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: Pastes
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Penicillin
(Package: lme4) :
Variation in penicillin testing
Six samples of penicillin were tested using the B. subtilis plate method on each of 24 plates. The response is the diameter (mm) of the zone of inhibition of growth of the organism.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: Penicillin
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VerbAgg
(Package: lme4) :
Verbal Aggression item responses
These are the item responses to a questionaire on verbal aggression. These data are used throughout De Boeck and Wilson, Explanatory Item Response Models (Springer, 2004) to illustrate various forms of item response models.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: VerbAgg
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cbpp
(Package: lme4) :
Contagious bovine pleuropneumonia
Contagious bovine pleuropneumonia (CBPP) is a major disease of cattle in Africa, caused by a mycoplasma. This dataset describes the serological incidence of CBPP in zebu cattle during a follow-up survey implemented in 15 commercial herds located in the Boji district of Ethiopia. The goal of the survey was to study the within-herd spread of CBPP in newly infected herds. Blood samples were quarterly collected from all animals of these herds to determine their CBPP status. These data were used to compute the serological incidence of CBPP (new cases occurring during a given time period). Some data are missing (lost to follow-up).
● Data Source:
CranContrib
● Keywords: datasets
● Alias: cbpp
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cake
(Package: lme4) :
Breakage Angle of Chocolate Cakes
Data on the breakage angle of chocolate cakes made with three different recipes and baked at six different temperatures. This is a split-plot design with the recipes being whole-units and the different temperatures being applied to sub-units (within replicates). The experimental notes suggest that the replicate numbering represents temporal ordering.
● Data Source:
CranContrib
● Keywords: datasets
● Alias: cake
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