Department

GeographyCourse Code

GGR270H1Professor

Damian DupuyStudy Guide

FinalThis

**preview**shows half of the first page. to view the full**3 pages of the document.**GGR 270 â Lecture 5 â October 13, 2010

Probability

îStudying spatial patterns is a key concern of geographers

oTry to understand what has led to these patterns

îGeography is about describing, explaining, and predicting geographic patterns and

processes

îUse probability for situations when patterns have some degree of uncertainty

oEx: weather î P.O.P

îProbability focuses on the occurrence of an event

oWhere one of several outcomes could result

oOutcomes are (and must be) mutually exclusive

îCan be thought of as frequency of an event occurring relative to all other outcomes

P(A) = F(A) / F(E) where...

îP(A) = Probability of outcome A occurring

îF(A) = Absolute frequency of A

îF(E) = Frequency of all other outcomes

Rules

îMax probability of an outcome is 1.0

oAll probabilities must add up to 1

îAddition rule:

oUsed when finding probability of single independent events

îP (A or B) = P(A) + P(B)

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