2010 March 30 / j d a v i s @ c a r l e t o n . e d u
Here's a frequency table for passengers on the Titanic, sorted by class.
Class  Count 

First  325 
Second  285 
Third  706 
Crew  885 
Here's the corresponding relative frequency table.
Class  % 

First  14.77 
Second  12.95 
Third  32.08 
Crew  40.21 
Here's a contingency table for comparing class to survival.
First  Second  Third  Crew  Total  

Alive  203  118  178  212  711 
Dead  122  167  528  673  1490 
Total  325  285  706  885  2201 
Here's the conditional distribution for class, conditioned on each survival value. (Each cell's value is expressed as a percentage of the row total.)
First  Second  Third  Crew  Total  

Alive  28.6%  16.6%  25.0%  29.8%  100% 
Dead  8.2%  11.2%  35.4%  45.2%  100% 
Here's the conditional distribution for survival, conditioned on each class value. (Each cell's value is expressed as a percentage of the column total.)
First  Second  Third  Crew  

Alive  62.5%  41.4%  25.2%  24.0% 
Dead  37.5%  58.6%  74.8%  76.0% 
Total  100%  100%  100%  100% 
Here are data from our introductory class survey. What questions are raised, and what conclusions do you draw?
Yes  No  Total  

Female  10  1  11 
Male  16  5  21 
Total  26  6  32 
These data come from your book — Chapter 3, Question 42. What do you think?
Tattoo (parlor)  Tattoo (elsewhere)  No tattoo  

Hepatitus C  17  8  18 
No hepatitus C  35  53  495 
Here are 32 heights (in inches) for our class, ranging from 59 to 76. Draw a histogram. Describe the shape.
59, 61, 64, 64, 65, 65, 66, 67, 67, 67, 67, 67, 68, 69, 69, 70, 70, 70, 70, 71, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 74, 76
Here are the heights of the 11 women and the 21 men, separately.
59, 61, 64, 65, 65, 66, 67, 67, 67, 68, 70
64, 67, 67, 69, 69, 70, 70, 70, 71, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 74, 76
Here are 32 estimates of Brazil's population, in millions. Draw a histogram. Describe its shape.
0.225, 1, 10, 18, 25, 75, 80, 90, 100, 100, 100, 140, 150, 175, 180, 200, 200, 200, 200, 200, 200, 200, 209, 210, 265, 300, 300, 300, 310, 350, 450, 545
Here are the 32 economic and social views (1 means very conservative, and 5 means very liberal).
3, 4, 4, 3, 3, 2, 2, 4, 2, 2, 3, 4, 4, 3, 3, 2, 2, 2, 4, 3, 2, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4
4, 5, 5, 3, 4, 3, 4, 4, 3, 5, 5, 4, 5, 4, 4, 2, 3, 4, 4, 5, 2, 3, 3, 5, 4, 5, 4, 4, 3, 4, 4, 4
What can you infer about income distribution in the USA? How about in Canada vs. Switzerland?

