For this task, take a close look at the data representation choices: Start by identifying all the charts and their types How suitable do you think the chart type choice(s) is to display the data? If they are not, what do you think they should have been? Are the marks and, especially, the attributes appropriately assigned and accurately portrayed? Go through Are there any data values/statistics presented in table/raw form that maybe could have benefited from a more visual representation?
Assignment Link: http://book.visualisingdata.com/chapter/chapter-6