Statistical tests in biology

Cell biologists measure oxygen consumption in independently cultured cell lines.

Evolutionary biologists compare adult beetle body length from two rearing environments.

Evolutionary biologists compare adult beetle body length from two rearing environments.

Plant physiologists measure photosynthesis in the same leaves before and after heat stress.

Behavioral biologists record the change in refuge-use time after a predator cue.

Microbiologists compare log bacterial density before and after a treatment in matched cultures.

Ecologists compare parasite burdens among fish from two independent lakes.

Evolutionary developmental biologists compare variation in wing length between two inbred fly lines.

Microbiologists compare the variability of colony diameters across three nutrient media.

Cell biologists examine the distribution of time to lysis among independent cultured cells.

Ecologists compare seedling biomass under three independent soil treatments.

Ecologists compare seedling biomass under three independent soil treatments.

Plant pathologists score leaf damage in three independently assigned pathogen treatments.

Beetle larvae from two genotypes are independently reared at two temperatures.

Plant ecologists compare nutrient treatment while accounting for initial plant height.

Physiologists measure the same animals at four assay temperatures.

Sensory biologists record activity scores from each insect under three light conditions.

Plant growth is compared across four nutrient regimes.

Plant growth is compared across four nutrient regimes.

Plant growth is compared across four nutrient regimes.

Ecologists compare skewed leaf-damage measurements among four treatments.

Evolutionary biologists measure wing and tail lengths in adult birds from a single population.

Microbial ecologists compare soil salinity with bacterial richness across independent soil cores.

Plant ecologists grow seedlings under a gradient of nitrogen supply.

Evolutionary biologists relate beetle horn length to body size and larval nutrition.

Physiologists measure enzyme activity along a temperature gradient with occasional unusually high assays.

Host choice in a parasitoid wasp

Germination of salt-tolerant seeds

Heat survival in evolved and ancestral yeast

Segregation in an F2 cross

Infection across three lizard habitats

Survival of rare resistant and susceptible clones

Antibody detection before and after an exposure season

Bee visits to three floral odors

Hybrid viability across parental divergence

De novo mutations in sequenced microbial lineages

Coral recruit counts and live coral cover

Bacterial colony counts with clumping

Parasite abundance and fish body length

Fish use of three unordered feeding microhabitats

Coral bleaching severity along a temperature gradient

Evolutionary biologists follow larval growth under two diets.

Immunologists record repeated infection outcomes in vaccinated and control hosts.

Pollinator visits are repeatedly counted on plants in two habitats.

Fish behavior is scored repeatedly using ordered stress categories.

Repeated infection screening after vaccination

Microbial ecologists count bacterial colonies in repeated water samples from experimental pond mesocosms.

Ecologists follow seedling survival until death or final observation.

Plant pathologists compare time to infection under three protective treatments.

Larval survival under stress is compared within 12 rearing blocks.

Seedling death times are related to protective dose and temperature.

Botanists compare germination timing after control or cold treatment.

Larvae from 24 populations experience a control or stress condition.

Independent insect larvae are randomly assigned to ambient or warm rearing.

Two comparable leaves per plant receive randomized control or shade treatment.

Test whether candidate sex-determination genes are unusually concentrated on the X chromosome.

Estimate average biomass from independent bacterial colonies with a right-skewed distribution.

Independent cell cultures differ in the waiting time to a developmental transition.

Compare gene expression between two conditions across 40 genes.

Compare gene expression between two conditions across 40 genes.

Four correlated morphological traits are measured in beetles from three ecotypes.

Four correlated morphological traits are measured in beetles from three ecotypes.

Four correlated morphological traits are measured in beetles from three ecotypes.