

Minitab  Central Tendency & Variability
The two groups of data from the overall example are given the names "A" and "B". The Minitab Worksheet is available.
Descriptive Statistics
Use the "Display Descriptive Statistics..." command off of the "Stat, Basic Statistics" menu. That is:
That will take you to the following dialog box:
Type the relevant variable(s) in the box (or double click them from the left hand menu). Then click on the "Statistics..." button which will take you to the following dialog box:.
Make sure you have the boxes that are checked above checked and click the OK button twice. The output will look like this:
Descriptive Statistics: A, B
Descriptive Statistics: A, BVariable N Mean TrMean StDev Variance Minimum
A 6 100.0 * 42.5 1810.0 50.0
B 6 100.0 * 32.2 1040.0 50.0Variable Q1 Median Q3 Maximum Range IQR
A 53.8 100.0 146.3 150.0 100.0 92.5
B 80.0 100.0 120.0 150.0 100.0 40.0There are several noteworthy points:
 Minitab takes the pain out of the calculations.
 The TrMean is the mean excluding the outer 5% of the distribution.
 We will discuss Q1 & Q3 in later sections of the course.