***Lecture 3*** Probability & Randomness

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Department
BioCore
Course
BCOR 102
Professor
Nicholas J.Gotelli
Semester
Summer

Description
8/30/13  Defining probability o p= the chance that something will happen, (never) (always) o o Nothing is truly random, caused by accumulation of various factors  Trials are not always identical  Defining Randomness o A mixture of measurement error & factors that are too complex to measure/model  Only have a limited amount of info to work with  Answer is more simplistic  Generality, can be extended to different circumstances  Variation in the real world o Biological variation- space, time, species, age, sex, etc. o Measurement variation- measurement error, measurement method, measurement conditions ∑ o Mean o Variance ∑ …… √ = =standard deviation  Normal distribution o Experimental studies  Good experimental conditions 1. Independence o
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