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.