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Q: Why do ecologists often find it necessary to use indirect sampling methods?
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How do ecologists measure population density?

By taking a sample of the entire population.


Methods of soil sampling?

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Which sampling method is based on probability?

There are many such methods: cluster sampling, stratified random sampling, simple random sampling.Their usefulness depends on the circumstances.


How can an ecologist ecologist measure population size?

Ecologists can estimate population size through methods such as mark-recapture, distance sampling, and census surveys. Mark-recapture involves capturing and marking individuals, releasing them, and then recapturing a sample to estimate total population size. Distance sampling involves estimating population size by observing and recording the distances to individuals from a specific vantage point. Census surveys involve conducting a thorough count of all individuals in a specific area.


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random sampling ,systematic sampling , self-selected , and there is one more i don't know


What is a basic method used by ecologists to study the living world?

The basic methods used by ecologists to study the living world include experimenting, classifying, and modelling, but not observing.


Is it true that ecologists may use both descriptive and quantitative methods of research in tier studies?

Yes, ecologists often use a combination of descriptive and quantitative methods in their research. Descriptive methods provide detailed observations and background information, while quantitative methods involve collecting numerical data and statistical analysis to test hypotheses and quantify relationships in ecological systems. The integration of both approaches helps ecologists gain a comprehensive understanding of the natural world.


For a large target population what are the sampling methods use to select the exact population?

There is no sampling method that will select the exact population.


What is sampling examine well known methods of probability and nonprobability sampling in statistic?

Non probability sampling and probability sampling are different because probability sampling uses random samples. Non probability sampling aren't random, but can still be representative of the population as a whole if done correctly.


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What are the two methods of prenatal diagnosis?

Amniocentesis and chorionic villi sampling.