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Unformatted text preview: John Allen Paulos
tells the story of how once he heard a local
weatherman claim that there was a 50% chance of rain on
Saturday and 50% chance of rain on Sunday, thus, a 100%
chance of rain during that weekend.
Do you agree with the weatherman?
Why or why not?
why NUS/FOS/DSAP Lecture 3 – 14 GEM2900 - Understanding Uncertainty & Statistical Thinking Semester 1, 2012/2013 The
The Rule Book…
Events that are unrelated to each other’s chance
of occurrence are called “independent,” When events A and B are said to be independent,
then we have
P ( A ∩ B ) = P ( A) × P ( B )
What does it mean by ‘independence’? – Two events do not affect each other’s chance
Question... If two events cannot occur at the
same time, are they independent?
are they independent? NUS/FOS/DSAP Lecture 3 – 15 GEM2900 - Understanding Uncertainty & Statistical Thinking Semester 1, 2012/2013 The Rule Book…
Example: Take a deck of cards, draw one card.
Consider the two events:
A: get an ace H: get a heart & Are these two events independent? NUS/FOS/DSAP Lecture 3 – 16...
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This note was uploaded on 12/21/2012 for the course MATH 2900 taught by Professor - during the Spring '12 term at National University of Singapore.
- Spring '12