A representative sample is used in statistical analysis and is a subset of a population that reflects the characteristics of the entire population.

The accuracy of general population estimates is only one facet of data quality for online samples. Frequently, survey researchers also want to understand the similarities and differences between ...

A good example is a Pew Research Center survey from June of this year, in which we wanted to focus in depth on the U.S. Hispanic population. In the previous survey from March, there were 291 Hispanic ...

Important A survey gathers information from a sample of a population, while a sample is a subset of the population selected for data collection in a survey.

Key Points Non-parametric tests are used when standard assumptions are not available. These tests don’t rely on distributions ...

Effective and noninvasive whale and biodiversity monitoring is now possible with the help of citizen scientists, opening up ...

Back in the day, we learned in statistics that you need a sample size of at least 2% of the size of population to make statistically significant conclusions about the behavior of the population ...

However, there is another possibility to define the origin of a population: autosomal single-nucleotide polymorphisms (SNPs) whose allele frequencies differ considerably in different populations.

Cancer does not develop overnight. It can take decades for cancer‐promoting changes in the genome to eventually lead to the formation of a malignant tumor.