Z-Score Formula

The Z-score is a statistical measure that describes how far a data point is from the average (mean) of a data set, expressed in terms of standard deviations. In simple terms, it tells you whether a score is above or below the average and by how much. A Z-score of 0 means the score is exactly average, while a positive score indicates it's above average and a negative score signifies it's below. This helps compare different data points on a common scale, making it easier to assess unusual or typical values in various contexts.