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Quantitative Methods in Psychology
Quantitative Methods in Psychology
July 15th, 2009: probability!
July 15th, 2009: probability!
Jeff Vietri
Jeff Vietri
Corresponding to chapter 6 in the text
Corresponding to chapter 6 in the text
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View Full Document Today's Agenda
Today's Agenda
Go over homework?
Discuss quiz?
Probability!

Making sense of probability

Notation

Getting p(x) with z(x) and the unit normal table
Starting from common language
Starting from common language
What is probability?

If something is probable, what do we mean?

If something is improbable?

Highly probable?
Probability is likelihood
The chance that something will happen
~odds

“The odds are that he'll pass”

Highly probable = good odds
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View Full Document Probability
Probability
How likely something is to occur
Value from 01
Think of probability as a proportion

Also on a 01 scale

Like proportion, it might make more sense to you if
you multiply it by 100 to give you the % chance

p = 0.5 = 50% chance
Probability of?
Probability of?
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This note was uploaded on 11/17/2011 for the course PSYCHOLOGY 830:200 taught by Professor Staff during the Fall '11 term at Rutgers.
 Fall '11
 Staff
 Psychology

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