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Q: When the population standard deviation is not know the sampling distribution is a?

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normal distribution

normal distribution

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in order to calculate the mean of the sample's mean and also to calculate the standard deviation of the sample's

The standard deviation in a standard normal distribution is 1.

Related questions

If the samples are drawn frm a normal population, when the population standard deviation is unknown and estimated by the sample standard deviation, the sampling distribution of the sample means follow a t-distribution.

normal distribution

normal distribution

You calculate the standard error using the data.

The answer will depend on the underlying distribution for the variable. You may not simply assume that the distribution is normal.

Thanks to the Central Limit Theorem, the sampling distribution of the mean is Gaussian (normal) whose mean is the population mean and whose standard deviation is the sample standard error.

the standard deviation of the population(sigma)/square root of sampling mean(n)

NO

400

No.

The standard deviation associated with a statistic and its sampling distribution.

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