What is a Z-Test : A Z-Test is a statistical test used to determine if there is a significant difference between the mean of a sample and a known population mean. It is used to test the hypothesis that the sample mean is different from the population mean. Example 1: A company wants to determine […]

What is Z-Score : A z-score, also known as a standard score, is a measure of how many standard deviations a particular data point is from the mean of a set of data. It is used to compare how different a particular data point is from the mean of the data set and to determine […]