2010 March 30 / j d a v i s @ c a r l e t o n . e d u

# Day 02 Notes

## Class and Survival on the Titanic

Here's a frequency table for passengers on the Titanic, sorted by class.

ClassCount
First325
Second285
Third706
Crew885

Here's the corresponding relative frequency table.

Class%
First14.77
Second12.95
Third32.08
Crew40.21

Here's a contingency table for comparing class to survival.

FirstSecondThirdCrewTotal
Alive203118178212711
Total3252857068852201

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.)

FirstSecondThirdCrewTotal
Alive28.6%16.6%25.0%29.8%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.)

FirstSecondThirdCrew
Alive62.5%41.4%25.2%24.0%
Total100%100%100%100%

Here are data from our introductory class survey. What questions are raised, and what conclusions do you draw?

YesNoTotal
Female10111
Male16521
Total26632

## Tattoos and Hepatitus C

These data come from your book — Chapter 3, Question 42. What do you think?

Tattoo (parlor)Tattoo (elsewhere)No tattoo
Hepatitus C17818
No hepatitus C3553495

## Class Histograms

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

## Disposable Household Income (Purchasing Price Parity, 2004)

RankCountryMean
1United States32,195
3Switzerland26,512
4United Kingdom26,193
5Norway25,961
6Austria24,485
7Germany22,585
8Denmark22,524
9Sweden21,193
10Belgium21,173
RankCountryMedian
1United States26,672
2Switzerland23,962
3Norway23,794