Customer service rating at bank
Use the diagram to explain that stacking the bars for each group can make it easier to compare the groups, especially when the data are ordinal.
Select Propn within Age group to standardise for the different numbers at each age.
Click Stacked. Observe
A major bank conducts a postal survey to assess customer reactions to the services it provides by mailing a questionnaire to a sample of account holders. One question asked customers to rate overall bank services on a scale between 1 (Excellent) and 5 (Unacceptable). The diagram below shows the distribution of these ratings for different age groups.