This procedure displays descriptive statistics for a given set of data.
1. Choose ProcessMA > Statistics > Descriptive Statistics.
2. In Variable, select the column containing the data.
3. Click OK.
Optional
4. In Segment by, select a column containing subgroup codes. Each subgroup will be analysed individually.
5. Check Plot graph, if you want to display the histogram of the data.
Note To select a column of data into a textbox, double-click on any of the column names shown in the list on the left of the dialog box while in the textbox.
Variable: Numeric.
Segment by: Text or Numeric. Must contain equal number of data points as the Variable.
You collected data on time (in minutes) to resolve a customer enquiry from two call centres (1 and 2). You want to describe the two sets of data.
1. Open worksheet ProcessMA > Tools > Data Files > Sample.xls.
2. Choose ProcessMA > Statistics > Descriptive Statistics.
3. In Variable, select A – Time.
4. In Segment by, select B – Call Centre.
5. Check Plot graph.
6. Click OK.
Interpretation
The data indicates that call centre 1, on average, takes about 2 minutes longer to resolve a customer enquiry. There is also greater variation experienced in call centre 1. The above can also be observed from the histogram.