e-Statistics > Textbook Data Sets
DALS Datasets
Aerobic fitness
Age and body fat percentage
Aids prevalence data
Avadex study
Biomass in soil
Blood pressure drug
Body fat in women
Cherry tree volume study
Chlorophyll concentration
Concrete block weight
Crab weights
Cucumber disease
Data with severe collinearity
Decomposition of organic material
Drug in rat liver
Effects of insecticides on mortality
Effect of stimuli on pillbugs
Equine lameness
Food intake for Danish people
Growth of duckweed
Hatching of cuckoo eggs
Heart rate reductions
Hormone study (Chapter 6)
Kidney stone treatment
Low birth weight
Malaria Strain
Mendelian inheritance
Moths lethality of insecticide
Moths lethality (male only)
Moths lethality (female only)
Nuclear family matters
Parasite counts for salmons
Pneumoconiosis among coalminers
Pork colour over time
Prescription sales on pharmacies
Quality of soap
Red blood cell adhesion
Respiratory function in children
Running time for relay race
Service time
Stearic acid and digestibility
Stomach experiment
Tartar for dogs
Tartar for dogs I
Tartar for dogs II
Tenderness of pork
Tensile strength
Tumor size
Urinary tract disease
Urinary tract disease I
Urinary tract disease II
Utilization of vitamin A
Vitamin A intake and BMR
Weight gain of rats
Word count data in two-way analysis

Effect of stimuli on pillbugs

An experiment on the effect of different stimuli was carried out with 60 pillbugs. The bugs were split into three groups: 20 bugs were exposed to strong light, 20 bugs were exposed to moisture, and 20 bugs were used as controls. For each bug it was registered how many seconds it used to move six inches.

  1. time: The number of seconds it took the pillbug to move six inches
  2. log_time: The logarithmic transformation of time
  3. group: treatment. A factor with levels: Control, Light, Moisture

Source. Samuels and Witmer (2003). Statistics for the Life Sciences (3rd ed.). Pearson Education, Inc., New Jersey.

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