Lesson 8: z-test
What is it?
The z-test for one sample uses a similar formula to the z-score for an individual, and it is used to find significant differences between a sample mean and a population mean. It indicates how likely it is that a sample with a certain mean and standard deviation came from the population being studied—that it has a population mean. Essentially, it asks: Given a population with a certain mean, how likely is it I could draw a sample with my given sample mean?
The z-test for one sample uses a similar formula to the z-score for an individual, and it is used to find significant differences between a sample mean and a population mean. It indicates how likely it is that a sample with a certain mean and standard deviation came from the population being studied—that it has a population mean. Essentially, it asks: Given a population with a certain mean, how likely is it I could draw a sample with my given sample mean?
posted by Dr. Randall W. Peterson at 9:10 PM
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