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Political polls can't ask everybody in the Us their opinion, so they as a small group -- called a sample.

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Q: What does sample mean in an entire population?
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What is population mean in statistics?

The population mean is the mean value of the entire population. Contrast this with sample mean, which is the mean value of a sample of the population.


What would it mean If the sampling error was zero?

The sample consisted of the entire population.


What does it mean to say that the sample variance provides an unbiased estimate of the population variance?

It means you can take a measure of the variance of the sample and expect that result to be consistent for the entire population, and the sample is a valid representation for/of the population and does not influence that measure of the population.


Is a census a collection of data based on a sample or the entire population?

The entire population.


A small number of people used to represent an entire population is called a?

A small number of people used to represent an entire population is called a sample. Typically the sample reflects characteristics of the larger population from which it is drawn.


What is the entire set in which a sample is drawn in math?

It is the population.


A random sample should be taken from?

A random sample should be taken from an entire population.


Why is the sample mean an unbiased estimator of the population mean?

The sample mean is an unbiased estimator of the population mean because the average of all the possible sample means of size n is equal to the population mean.


Difference between calculating the sample mean and the population mean?

The same basic formula is used to calculate the sample or population mean. The sample mean is x bar and the population mean is mu. Add all the values in the sample or population and divide by the number of data values.


What is the best estimator of population mean?

The best estimator of the population mean is the sample mean. It is unbiased and efficient, making it a reliable estimator when looking to estimate the population mean from a sample.


What does sample mean in math?

In maths, a sample is a group of things (people, books, pets etc...) randomly selected from a population (of people, books, pets etc...), which can be used to draw conclusions about the entire population. Sampling is very useful, since in most cases is it not possible to collect data from an entire population. Technically it is a "random subset of the population".


What is the difference between calculating the sample mean and the population mean?

You calculate the actual sample mean, and from that number, you then estimate the probable mean (or the range) of the population from which that sample was drawn.