Biodiversity continued to decrease in most of the areas we studied, irrespective of population increase or decrease. Only ...

New research has highlighted the often-overlooked strengths of LGBT (Lesbian, Gay, Bisexual, Transgender) adolescents.

In their new book After the Spike, demographers Dean Spears and Michael Geruso make the counterintuitive case for worrying ...

Objective To assess the association between educational level and cardiovascular age acceleration metric derived from ECG, and to determine whether this association is mediated by established ...

Sampling bias is the expectation, which is known in advance, that a sample won’t be representative of the true population—for instance, if the sample ends up having proportionally more women ...

Here in Cumberland County, about one-third of the population is 65 and older. That compares to less than 18% in the U.S. as a whole. The county seat here is Crossville, population around 12,500.

Limitations of SRS. Idea of stratified random sampling. Estimation of population mean (method of allocation not included). Preparation of Questionnaire and schedule. Idea of pilot survey.

These new smaller estimates of Neanderthal population size suggest that Neanderthals may have disappeared because "they were simply absorbed into the modern human population," Akey said.

Choosing between population and sample variance depends on your data set and research goals. If you're looking at a complete set of data with no elements left out, use population variance.

Many, such as a population's mean and standard deviation, are represented by Greek letters like µ (mu) and σ (sigma). These statistics are inferential in nature, much of the time because samples ...