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Earn +20 ptsQ: Why do we sample and estimate populations?
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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.
Using a pooled sample estimator for sigma squared assumes the two populations have what?
equal variances
Difference between Population From a sample?
population is the number of citizens living in a defined geographical area. Sample is a number taken from the population being the sample to research for a topic about the populations' behavior or habit, etc.
What is a sample correlation?
If measurements are taken for two (or more) variable for a sample , then the correlation between the variables are the sample correlation. If the sample is representative then the sample correlation will be a good estimate of the true population correlation.
A sample mean is the best point estimate of the?
he population mean
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