Z-scores are a measure of what number of normal deviations a knowledge level is away from the imply. They’re used to match information factors from totally different distributions and to establish outliers. The method 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 a knowledge 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 can be used to establish outliers. An outlier is a knowledge level that’s considerably totally different from the remainder of the information. Outliers might be attributable to errors in information assortment or by the presence of a special inhabitants within the information.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, observe 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.
