chance variation

Chance variations have a natural spread across the normal curve as explained above, for practical purposes.

The statistical distributions suggested nothing more than chance variation.

Genetic drift refers to random effects resulting from chance variation in the genes, environment, or development.

Stochastic models depend on the chance variations in risk of exposure, disease and other illness dynamics.

Jeffries Wyman at Harvard saw no truth in chance variations.

If statistical significance does not improve, this typically shows the experiments have just been repeated until a success occurs due to chance variations.

"But you came with Twissell, a chance variation.

The less fuzzy, the lower the probability of chance variation spoiling the result, but the probability is never absolutely zero.

This will reduce the variability of timings due to chance variations in overlap, and so make it possible to calculate run timings more accurately.

However, this has the drawback of variable sample size, and different portions of the population may still be over- or under-represented due to chance variation in selections.

Current statistics such as Rank products aim to strike a balance between false discovery of genes due to chance variation and non-discovery of differentially expressed genes.

But we know that there is novelty in evolution, driven in part by chance variations in the gene pool, some of which outreproduce existing species and so are naturally selected.

To achieve coherence, therefore, the designer must state his parameters, his criteria of success, as precisely and restrictively as possible, before setting up conditions that exploit chance variations on a theme.

In cultural drift, the frequency of cultural traits in a population may be subject to random fluctuations due to chance variations in which traits are observed and transmitted (sometimes called "sampling error").

Dr. Griner said, "It's hard to believe that the rise could occur through changes in the quality of care" and "that great of a change has to be due in part to a chance variation or other factors."

In 1872, Gulick was the first to propose the theory that the majority of evolutionary changes are the result of chance variation, which has no effect on the survival and reproductive success of a species (today called "genetic drift").

Social Darwinism, with its emphasis on the survival of the fittest and chance variation, denied the effects of will, conscious planning and human agency in evolution, and of altering the fixed characteristics of different groups or races.

Instead, through a combination of family studies and the latest techniques of molecular biology, they have found markers, chance variations in the chemistry of the genes so close to the putative defective gene that they are almost always inherited together.

A silhouetted canoe subtly but constantly shifts as a firm configuration, depending on the viewer's position; the pegboard's industrial detachment is challenged by the boat's personal symbolism, and thick circles of paint in predictable rows seem controlled but at the same time reveal an infinity of chance variations.

Since birth weight (and viability) in the teens increases dramatically with rising age and, inasmuch as higher parity among women under age 20 also meant higher maternal age in that age class, decreasing infant mortality in this age group by birth order may be more than chance variation.

This means that there is not any chance variation of which copy is inherited, and also (for most of the chromosome) not any shuffling between copies by recombination; so, unlike autosomal haplotypes, there is effectively not any randomisation of the Y-chromosome haplotype between generations.

After detailing the opinions of John Money and Julianne Imperato-McGuinely on gender identity, Fausto-Sterling concludes with the three influences that affect gender - genetic regulatory information, intrusion from outside the womb, and "chance variation" in development - and two points on sexual development."