18.2 Graph of Individual Observations
Create a graph for the 32 samples of the pH values (file CHLORINE.MTW) obtained in the last day. To achieve that, first, separate the values which correspond to that last day (which is a Friday; that is why we add an ‘F’ at the end of the variable names in the new columns). This is done by copying the selected columns, as follows.
Data > Copy > Columns to Columns
Stat > Control Charts > Variables Charts for Individuals > Individuals
Use all default options to obtain: