CAPS Terms for Teachers: Z-test

Z-tests are significantly different when the population standard deviations are known and the sample sizes are large: A z-test is a statistical test used to compare two population means and determine whether they are significantly different from each other. It is typically applied when the population standard deviations are known, and the sample sizes are large. The z-test utilizes the standard normal distribution and calculates the z-score to assess the significance of the difference between the means.