Changes

The '''Z-test''' is a [[statistical test]] used in inference which determines if the difference between a sample mean and the population mean is large enough to be statistically significant.

The '''Z-test''' is a [[statistics|statistical test]] used in inference which determines if the difference between a sample mean and the population mean is large enough to be statistically significant.

The Z-test is conducted by the following steps:

The Z-test is conducted by the following steps:

The Z-score is then compared to a Z-table.  The Z-table indicates whether the calculated z-score is within the realm of chance or if the z-score is so different that the sample mean is unlikely to have happened by chance.

The Z-score is then compared to a Z-table.  The Z-table indicates whether the calculated z-score is within the realm of chance or if the z-score is so different that the sample mean is unlikely to have happened by chance.

[[Category:Mathematics]]

 

[[Category:Statistics]]