What is a sub population?

What is a sub population?

: an identifiable fraction or subdivision of a population.

What is sub population in research?

A subpopulation is essentially a fraction or part of the overall pool of the population you are surveying. A subpopulation can be defined many ways. For example, some of the most common subpopulations to examine in research are gender (e.g. male and female), age (e.g. <35, 35-54, 55+), race/ethnicity, location, etc.

What is metapopulation theory?

Metapopulation theory is used to analyse the effects of habitat fragmentation on birds in the temperate zone, integrating various explanations for the paucity of species in isolated ecotopes. There is some evidence that turnover of local populations occurs in fragmented systems.

What does population mean in stats?

A population is a distinct group of individuals, whether that group comprises a nation or a group of people with a common characteristic. In statistics, a population is the pool of individuals from which a statistical sample is drawn for a study. Only an analysis of an entire population would have no standard error.

What are the types of metapopulation?

More generally, Harrison and Taylor (1997) cautioned that classical metapopulations could be rare and that metapopulations in nature can have a diversity of structures including mainland-island, patchy popula- tion, nonequilibrium metapopulation (Fig. 2), and mixed structures at different spatial scales. …

Are humans a metapopulation?

The researchers advocate a structured population model, as humans evolved from multiple interconnected subpopulations of early humans, spread out across Africa in a large metapopulation. A structured model reflects a continuous process of fission, fusion, gene flow and local extinction.

What is the population mean formula?

The formula to find the population mean is: μ = (Σ * X)/ N. where: Σ means “the sum of.” X = all the individual items in the group.

How do you know if a sample size is accurate?

Before you can calculate a sample size, you need to determine a few things about the target population and the level of accuracy you need:

1. Population size. How many people are you talking about in total?
2. Margin of error (confidence interval)
3. Confidence level.
4. Standard deviation.

How is metapopulation calculated?

A basic metapopulation model:

1. I=pi⋅(1−f)(Eq. The more sites are occupied, the higher the rate of patch extinction!
2. E=pe⋅f(Eq. Combining equation 1 with the above equations, we get our first metapopulation model:
3. Δf=pi(1−f)−pef(Eq. This model (and the following models) assume the following:

How can I analyze a subpopulation of my survey data in?

Notice in the output of the svy: tab command that there are 789.6 cases coded 1. (It is not a whole number because we are estimating this value using the probability weights.) In the output of the svy: mean command, we also see that 789.552 cases are included in the subpopulation. Now let’s try to use a variable coded 1/2 instead of 0/1.

When to use the subpopulation option in an estimate?

When the subpopulation option (s) is used, only the cases defined by the subpopulation are used in the calculation of the estimate, but all cases are used in the calculation of the standard errors.

How is flow cytometry used in subpopulation analysis?

Flow Cytometry (FACS Analysis) For Highly Accurate Subpopulation Analysis Flow cytometry—commonly referred to as FACS analysis — is an accurate and effective method when used to identify and measure cellular biomarkers in complex subpopulations.

Are there subpopulations that are not taken into account?

Subpopulations are not taken into account specifically, other than in the threshold and non-threshold approaches used to derive the values of the thresholds of concern for different structural classes (see sections 3 and 6). Daniel A. Vallero, in Waste (Second Edition), 2019 Some subpopulations are more vulnerable to exposures than others.

https://www.youtube.com/watch?v=kU7wSX5RkvU