August 25,

 Passengers on the Titanic by class of ticket. ClassCount 1 st nd rd th 885

1. Make a Picture! 2. Make a Picture! 3. Make a Picture!

 Pile together things that seem to go together.  This helps us to see how the cases distribute across several categories.

 Table that records the totals and category names.  Relative Frequency Table  Displays the percentages, rather than the actual counts.

ClassCount 1 st nd rd th 885 Class% 1 st nd rd th 40.21

 Area Principle  The area occupied by a part of the graph should correspond to the magnitude of the value it represents.

 Displays the distribution of a categorical variable, showing the counts of each category adjacent to each other.  Relative Frequency Bar Chart  Using the percentage of each category instead of the actual count

 Whole group is a circle  Each slice is a category whose size is proportional to the fraction of the whole in each category.

 Use a bar or pie chart when the data are counts or percentages.

 Read pgs. 20 – 24  Pg. 36 – 37  #’s 1 – 8 (omit 4), 10