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Why do ecologists use the technique of sampling to estimate population size?
Wiki User
∙ 12y ago
In many cases, it is not even possible to count signs of every member of a population. The population may be very large or spread over a wide area. In such cases ecologists usually make an estimate. An estimate is an approximation of number, based on reasonable assumptions.
Wiki User
∙ 12y ago
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What are the disadvantages of systematic sampling?
Disadvantages of systematic sampling: © The process of selection can interact with a hidden periodic trait within the population. If the sampling technique coincides with the periodicity of the trait, the sampling technique will no longer be random and representativeness of the sample is compromised.
How can an ecologist predict the size of a population without counting every organism in the population?
Through mark-and-recapture projects, direct observations, or targeted sampling, ecologists are able to determine the population of a particular species. This process is a scientific estimation of the population.
Is questionnaire probability sampling technique?
A questionnaire has little to do with sampling technique. Sampling technique is to do with who gets the questionnaire and that can be any sampling technique: the questionnaire can be sent to everyone (census), to a random sample, stratified random samples, to random samples in clusters, by quota or convenience. Or a pile of questionnaires can be left for respondents to pick up - self-selection.
What is the absolute value of the difference between the point estimate and the population parameter it estimates?
B. The sampling error
What are advantages and disadvantages of systematic sampling?
It can interact with a hidden periodic trait within a population hence the technique will be compromised since there will not be random and representativeness of the saple
Which sampling technique can assure that the profile of the sample matches the profile of the population?
Stratified sampling
What sampling technique will be the best for the large population size?
Clustered sampling.Clustered sampling.Clustered sampling.Clustered sampling.
What is slovene's formula?
it's a random sampling technique formula to estimate sampling size n=N/1+N(e)2 n- sampling size N-total population e-level of confidence
What are the disadvantages of systematic sampling?
Disadvantages of systematic sampling: © The process of selection can interact with a hidden periodic trait within the population. If the sampling technique coincides with the periodicity of the trait, the sampling technique will no longer be random and representativeness of the sample is compromised.
Sampling error refers to?
Sampling error occurs when the sampling protocol does not produce a representative sample. It may be that the sampling technique over represented a certain portion of the population, causing sample bias in the final study population.
Why sampling needed?
Sampling is needed in order to determine the properties of a distribution or a population. Sampling allows the scientist to determine the variance in an estimate.
What is common sampling technique in communication system?
Random Sampling is the most common sampling technique
Which sampling technique is appropriate for voting behaviour of people?
stratified sampling technique
Why you use sloven's formula?
it's a random sampling technique formula to estimate sampling sizen=N/1+N(e)2n- sampling sizeN-total populatione-level of confidence
How can an ecologist predict the size of a population without counting every organism in the population?
Through mark-and-recapture projects, direct observations, or targeted sampling, ecologists are able to determine the population of a particular species. This process is a scientific estimation of the population.
What type of research technique does a sociologist ensure that data are statistically representative of the population being studied?
Sampling
What do ecologists use pitfall traps quadrats and sweep nets for?
Sampling of individual organisms.
