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Null distribution

Hypothesis Testing

Subject: 
Statistics
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Statistical hypothesis testing
Statistical inference
Scientific method
Null hypothesis
P-value
Null distribution
Statistical significance
Alternative hypothesis
Statistics
Type I and type II errors
F-test
Test statistic

6-1 Section 6: Introduction to Hypothesis Testing To begin with, recall the ?Helper/Hinderer? study that we looked at on the first day of class: Case Study: Naughty or Nice? We all recognize the difference between naughty and nice, right? What about children less than a year old ? do they recognize the difference and show a preference for nice over naughty? In a study reported in the November 2007 issue of Nature, researchers investigated whether infants take into account an individual?s actions towards others in evaluating that individual as appealing or aversive, perhaps laying for the foundation for social interaction (Hamlin, Wynn, and Bloom, 2007). In one component of the study, 10-month-old
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