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Select the scenarios where the methods of this section can be used to construct a confidence interval for the population mean. Assume that a is unknown.

A simple random sample of size 150 is drawn from a distribution that is not close to normal.

A nonrandom sample is drawn.

A simple random sample of size 27 is drawn from a distribution that is not close to normal.

A simple random sample of size 13 is drawn from a distribution that is approximately normal

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