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The sample size should include several hundred fruit flies, at the very least. The more fruit flies there are in the experiment, the more accurate it will be.
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What is the number of animals used in an experimental study is called?
Sample Size
How do ecologists find out the numbers of each animal?
Ecologists sample areas in the environment they wish to study to work out a vague idea of the numbers of different species in their habitat. 4 methods of sampling are used; Quadrats, Random sampling, Systematic sampling using transects and the Lincoln index (mark-release-recapture). For mobile animals the best method is the Lincoln index which is an estimation of population size using to samples of the area. First they sample the area capturing the species they desire and mark them with a non toxic marker. After a suitable period of time they re sample the area. Estimated population size = Number of individuals caught in 1st sample * Number of individuals caught in 2nd sample/total number of individuals re caught from 1st sample in the 2nd sample. Assumptions must be made for the whole sample and statistical tests must be used to detect any factor that would have an effect on the results e.g. chance.
What are some examples of variation in animals?
Plant height, shape, size and number of leaves, flower color, fruit shape & size etc.
``how much should I feed my dog"?
depends on size
How big was a spinosaurs eggs?
Try seeing Jurassic Park 2 and see if you can find T-Rex eggs. Multiply the egg size by two. That should be the egg size of a Spinosaurus egg because the Spinosaurus is twice the size of a T-Rex.
Will margins of error for sample of size 80 be larger or smaller than those for sample size of 40?
They should be smaller for the sample size 80.
How does sample size affect the size of your standard error?
The standard error should decrease as the sample size increases. For larger samples, the standard error is inversely proportional to the square root of the sample size.The standard error should decrease as the sample size increases. For larger samples, the standard error is inversely proportional to the square root of the sample size.The standard error should decrease as the sample size increases. For larger samples, the standard error is inversely proportional to the square root of the sample size.The standard error should decrease as the sample size increases. For larger samples, the standard error is inversely proportional to the square root of the sample size.
How does increasing the sample size affect the sample error of the mean?
It should reduce the sample error.
What happens to the crtitical value for a chi square test if the size of the sample is increased?
The size of the sample should not affect the critical value.
Why the sample should be normally distributed?
The sample should not be normally distributed.If you have a population of size N from which a random sample of size n is to be drawn, then there are NCn possible samples. Each one of these must have the same probability of being thesample. That is, the sample is uniformly distributed - not Normally.
What happens when you increase the sample size in an experiment?
Estimates based on the sample should become more accurate.
What is absolute sample size?
It is the number of elements in the sample. By contrast, the relative sample size is the absolute sample size divided by the population size.
Will the standard error decrease if the sample size increases?
it should decrease
What is the difference between sample and sample size?
a sample is a sample sized piece given... a sample size is the amount given in one sample
The ideal sample size should contain this many individuals?
1000-1500
When the sample size is large valid confidence intervals can be established for the population mean irrespective of the shape of the underlying distribution?
Yes, but that begs the question: how large should the sample size be?
What is the daily recommended portion size of vegetables?
The size ofportion of fruit or veg you should eat each day should be the size of your palm
