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PSY32 - Lecture 11

PSY32 - Lecture 11 - Today Admin Paper 2 due at the...

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Today *Admin *Paper 2 due at the beginning of lab this week *Study 3 continues in lab this week *Time to Look Over Exam 1 *Hypothesis Testing Last Time *Writing Workshop *Exam 1 *Between-Participants Design Hypothesis Testing I *What is a hypothesis? *Specific prediction about the relationship between two or more variables Two Kinds of Hypotheses *Scientific hypothesis *A statement that there is a relationship or difference between variables *AKA alternative hypothesis or research hypothesis *Null hypothesis *A statement of no relationship between variables *The scientific and null hypotheses must be devised to be mutually exclusive. *If H 1 is directional, than H 0 needs to indicate that either no relationship or the opposite relationship exists. Courtroom Analogy *Consider a jury's hypothesis: *H 0 : The defendant is innocent. *H 1 : The defendant is guilty. *“innocent until proven guilty” = “null until proven scientific” *alpha = standard for reasonable doubt *.05 ?
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