For continuous variables, the Summary Statistics report displays the mean, standard deviation, and other summary statistics. You can control which statistics appear in this report by selecting Customize Summary Statistics from the red triangle menu next to Summary Statistics.
Tip: You can specify which summary statistics show in the report each time you run a Distribution analysis for a continuous variable. Select File > Preferences > Platforms > Distribution Summary Statistics, and select the ones that you want to appear.
|
•
|
Description of the Summary Statistics Report describes the statistics that appear by default.
|
|
•
|
Additional Summary Statistics describes additional statistics that you can add to the report using the Customize Summary Statistics window.
|
Measures peakedness or heaviness of tails. See Kurtosis for formula details.
The mean calculated after removing the smallest p% and the largest p% of the data. The value of p is entered in the Enter trimmed mean percent text box at the bottom of the window. The Trimmed Mean option is not available if you have specified a Weight variable.
The nth root of the product of the data. For example, geometric means are often used to calculate interest rates. The statistic is also helpful when the data contains a large value in a skewed distribution.
Note: Negative values result in missing numbers, and zero values (with no negative values) result in zero.
The robust mean, calculated in a way that is resistant to outliers, using Huber's M-estimation. See Huber and Ronchetti (2009).