Topic: Biology

Methods: ANOVA, Boxplot,
Topics: Environment, Nature, Biology,
Datafile Name: Cuckoo Egg Lengths

That cuckoo eggs were peculiar to the locality where found was already known in 1892. A study by E.B. Chance in 1940 called The Truth About the Cuckoo demonstrated that cuckoos return year after year to the same territory and lay their eggs in the nests of a particular host species. Further, cuck...

Methods: Experimental Design, Nested Model, General Linear Model, Dotplot, Boxplot,
Topics: Biology,
Datafile Name: Eggs

A single can of dried eggs was stirred well. Samples were drawn and a pair of samples (claimed to be of two "types"), was sent to each of six commercial laboratories to be analyzed for fat content. Each laboratory assigned two technicians, who each analyzed both "types". Since...

Methods: MANOVA, Multivariate Regression, Plot Matrix, Principal Components,
Topics: Archeology, Biology,
Datafile Name: Egyptian Skulls

Four measurements were made of male Egyptian skulls from five different time periods ranging from 4000 B.C. to 150 A.D. We wish to analyze the data to determine if there are any differences in the skull sizes between the time periods and if they show any changes with time. The researchers theoriz...

Methods: Boxplot, MANOVA, Post Hoc Test,
Topics: Biology,
Datafile Name: Flea Beetles

Data were collected on the genus of flea beetle Chaetocnema, which contains three species: concinna(Con), heikertingeri (Hei), and heptapotamica (Hep). Measurements were made on the width and angle of the aedeagus of each beetle.

Methods: Nonlinear Regression, Transformation, Regression,
Topics: Biology,
Datafile Name: Medflies

By using Mediterranean fruit flies, Gompertz's 1825 theory that mortality rates increase at an exponential rate as age increases is examined. (i.e. as an organism gets older, its chance of dying per unit of time increases exponentially.) 1,203,646 fruit flies comprised the population for this...

Methods: Regression, Transformation,
Topics: Health, Biology,
Datafile Name: Mercury in Bass

Mercury contamination of edible freshwater fish poses a direct threat to our health. Largemouth bass were studied in 53 different Florida lakes to examine the factors that influence the level of mercury contamination. Water samples were collected from the surface of the middle of each lake in Aug...

Methods: ANOVA, Experimental Design, Paired T-Test, Repeated Measures,
Topics: Biology,
Datafile Name: Termites

The bark of some tropical trees seems to offer protection from termites. If this protection could be harnessed, the trees that produce the resin might become a valuable resource. Experimentors investigated the effects of these tree resins on termites. The resin dissolved in a solvent and placed o...

Methods: Paired T-Test, T-test,
Topics: Biology,
Datafile Name: Student t-distribution

Charles Darwin (1809-1882), author of The Origin of Species (1859) later investi-
gated the effect of cross-fertilization on the size of plants. Pairs of plants, one cross- 
and one self-fertilized at the same time and whose parents were grown from the same
seed, were pl...

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