Z-scores are a measure of what number of normal deviations an information level is away from the imply. They’re used to check knowledge factors from totally different distributions and to establish outliers. The formulation for calculating a z-score is:z = (x – mu) / sigmawhere: x is the information level mu is the imply* sigma is the usual deviation
Z-scores can be utilized to search out the likelihood of an information level occurring. For instance, a z-score of 1 signifies that the information level is one normal deviation above the imply, and the likelihood of this occurring is roughly 0.1587.Z-scores may also be used to establish outliers. An outlier is an information level that’s considerably totally different from the remainder of the information. Outliers might be brought on by errors in knowledge assortment or by the presence of a unique inhabitants within the knowledge.The HP Prime G2 is a graphing calculator that can be utilized to search out z-scores. To discover a z-score on the HP Prime G2, comply with these steps:1. Enter the information level into the calculator.2. Press the “STAT” button.3. Choose the “Calc” menu.4. Choose the “z-Rating” choice.5. Enter the imply and normal deviation of the information.6. Press the “ENTER” button.The calculator will show the z-score for the information level.
