Should use a z test or a t test in carrying out the analysis

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Reference no: EM131405389

A researcher wants to carry out a hypothesis test involving the mean for a sample of size . She does not know the true value of the population standard deviation, but is reasonably sure that the underlying population is approximately normally distributed.

Should she use a z-test or a t-test in carrying out the analysis? Why?

Reference no: EM131405389

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