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Q: Why do scientists need to know the size of a population?
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What does population size mean in science?

It is the number of units in a statistical study. The "population" need not refer to people. For example, when researching house prices in an area, the population would comprise all the houses in the area and the population size would be the number of houses.


How large would your sample have to be for appropriate estimation of the whole population?

First you have chose an estimator for what you want to know about the population. In general the level of variability in the result that any estimator provides will depend on the variability in the population. Therefore, the greater the variability in the population the larger your sample size must be. You will also need to decide how much precision is required in your estimate. The more precision you require the greater your sample size will have to be.


What does population size means?

Statistics often requires one to make estimates of some measure (variable) about a set of units. The total number of such units is the population size. Note that population, in this context, need not refer to people. If the study is about household expenditure on food (in some area), then the population is all households and the population size is the number of households (in that area). If the study is about diversity of insects in a field, the population may be all 1-metre squares in the field, and the size of the population will be the number of such plots - which will equal the area of the field.


Can the margin of error be determined if only the confidence level is known?

No, more information is needed to determine the margin of error. For example, one may need to know the sample's mean, the sample size, and the standard deviations of the population and sample. Depending on the type of test one is performing, certain parameters need not be known. For example, the population standard deviation does not need to be known in a one sample T-test.


When can you estimate a population's size when counting individuals in a sample of the population?

You can estimate a population's size when counting individuals if the density in a sample is greater than the population density.

Related questions

How can scientists use radio collares to estímate a population’s size?

This question is unclear because I do not know what collares are.


What is the population size in India?

i dint realy know try to google it


What is the population size in Antarctica?

There is no permanent or native population on the continent. Research stations' population of temporary workers and scientists in summer may reach 10,000 - 12,000 and in winter, be reduced to about 4,000. These are only gross estimates.


Is there any population in antarctica?

There is no native or permanent population on the continent. Temporary workers and scientists, however, do exist there, from about 1,000 in winter to about 4,500 in summer -- on a continent the size of USA and Mexico, combined.


Why do you need a system of measurement?

So that when scientists make a project around the world, the pieces are the same size


When tagging animals specifically for the study of population size scientists must do all of the following EXCEPT?

tag them all during the first study


What is jayy von monroe's shoe size?

Don't know why you need to know, but size 11 :D


What size Bra do you need if you have a breast measurement of B?

We'd need to know the band size in order to answer this.


What would a 3000 population liquor store size need to be?

800 to 1200 sq.ft. would be a good size.


Why measure population size?

Measuring population size is important for understanding demographics, planning resource allocation, and assessing the impact of social and economic policies. It helps governments and organizations make informed decisions, identify trends, and address specific needs within a population.


How do you size men's clothing by height and weight?

Actually, you do not size men's clothing by height and weight. You need to know the waste size and inseam size of the trousers. You need to know the shirt size. I have given a number of gifts that did not fit to charity.


How does a scientists count count a species population?

Scientists can count a species population using methods such as observational surveys, camera traps, radio tracking, and genetic analysis. These methods help estimate population size and distribution accurately, allowing scientists to monitor changes over time and implement conservation strategies effectively.