This means that we first have to identify the extreme data values. The trimmed mean is the mean of the data set after removal of the most extreme data values. IQR = 75% Percentile - 25% Percentile = 49340.Ĭalculate the trimmed mean of the "INCOME" column. You can calculate the variance as the square of the standard deviation = 13070891584.Ĭalculate the interquartile range (IQR) of the "INCOME" column.
The results table contains all the values that you need:Ĭalculate the variance of the "INCOME" column. Select the statistics that you need and click "OK". Here you can specify the descriptive statistics that you want to calculate. Select the type of analysis and the column on which you want to perform the analysis:.Click the "Analyze" button in the "Analysis" section of the upper toolbar.Descriptive statistics are calculated for each column of a column table in the "Column statistics" analysis.Īs an example, we will use the cfb data (see Exercise 2C).Ĭalculate mean, median, standard deviation and quartiles of the "INCOME" column, which represents the yearly income per household. the dispersion of the values in the data set: standard deviation, variance, minimum, maximum, kurtosis, skewnessįor a detailed description of these measures we refer to the tutorial, Chapter 8.Ĭalculation of descriptive statistics is a statistical analysis so you have to use the "Analyze" button in the "Analysis" section of the upper toolbar.the center of the data set: mean, median, mode.
Go to parent GraphPad Prism statistical analyses Exercise 9A: Descriptive statistics of cfb data setĭescriptive statistics is a set of statistical measures that describe the main characteristics of a data set including:
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