Z-scores are a measure of how many standard deviations a data point is away from the mean. They are used to compare data points from different distributions and to identify outliers. The formula for calculating a z-score is:z = (x – mu) / sigmawhere: x is the data point mu is the mean* sigma is the standard deviation
Z-scores can be used to find the probability of a data point occurring. For example, a z-score of 1 indicates that the data point is one standard deviation above the mean, and the probability of this occurring is approximately 0.1587.Z-scores can also be used to identify outliers. An outlier is a data point that is significantly different from the rest of the data. Outliers can be caused by errors in data collection or by the presence of a different population in the data.The HP Prime G2 is a graphing calculator that can be used to find z-scores. To find a z-score on the HP Prime G2, follow these steps:1. Enter the data point into the calculator.2. Press the “STAT” button.3. Select the “Calc” menu.4. Select the “z-Score” option.5. Enter the mean and standard deviation of the data.6. Press the “ENTER” button.The calculator will display the z-score for the data point.
