Intro to Business Analytics
A one-sample z-test is a statistical method used to determine whether the mean of a single sample is significantly different from a known population mean, under the assumption that the population variance is known. This test is commonly applied when the sample size is large (typically n > 30), allowing the sampling distribution of the sample mean to be approximated by a normal distribution, which makes it easier to calculate probabilities and make inferences about the population.
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