July+15th+slides

# July+15th+slides - Quantitative Methods in Psychology...

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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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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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Probability Probability How likely something is to occur Value from 0-1 Think of probability as a proportion - Also on a 0-1 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.

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July+15th+slides - Quantitative Methods in Psychology...

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