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Lecture 8

# Lecture 8 - Sampling Distribution of the Mean - November 15.docx

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School
University of Toronto St. George
Department
Psychology
Course
PSY201H1
Professor
Kristie Dukewich
Semester
Fall

Description
November 15, 2012. Lecture 8 – Sampling Distribution of the Mean What is a sampling distribution?  Helps us evaluate the statistic from our sample  Matched to a statistic  All possible values blah blah blah seen this slide before… Generating a Sampling Distribution  Probability Approach: uses basic probabilities  Empirical Approach: uses an actual or theoretical set of population scores that exist if the IV has no effect  Let’s define population of 400 unbiased coin flips o A priori probability: 50% heads  Null-Hypothesis Population of Coin Flips  ….. General Characteristics of the Sampling Distribution of the Mean, for any N  It’s a frequency distribution of means o Those means are calculated by drawing all possible samples of N sized samples from the null population, calculating the mean for each sample, and plotting it.  It contains all values the mean can take  Its mean equals
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