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This 2 page Reader was uploaded by Hannah Wheeler on Tuesday October 20, 2015. The Reader belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 17 views.
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Date Created: 10/20/15
Psych Stats Exam 2 Study Guide De nitions Con rmation Bias Our unintentional tendency to pay attention 0 evidence that con rms what we what we already believe and to ignore evidence that would discon rm our beliefs Ex When an athlete attributes her team s wins to her lucky earrings and ignores any losses lllusionary Correlation The phenomenon of believing one sees an association between variables when no such association exists Ex An athlete attributes her personal wins to her lucky earrings Type 1 Error lnvolves rejecting the null hypothesis when the null hypothesis is correct Ex Saying there s a relationship between murder and ice cream when there isn t Type 2 Error lnvolves failing to reject the null hypothesis when the null hypothesis is false Ex Saying there isn t a relationship between murder and ice cream when there is Personal Probability A person s own judgment about the likelihood that an event will occur Also called Subjective Probability Ex If someone says quotThere is a 75 chance I will nish my paper and go out tonightquot RelativeFrequency Probability The likelihood of an event occurring based on the actual outcome of many many trials Ex Flipping a coin Convenience Sample One that uses participants who are readily available Random Sample One in which every member of the population has an equal chance of being selected into the study Random Assignment The protocol established for an experiment whereby every participant in a study has an equal chance of being assigned to any of the experimental groups or conditions in the study Short Answer Questions What are the 6 Steps of Hypothesis Testing 1 Identify the population distribution and assumptions 2 State the null and research hypothesis both in symbols and in words 3 Determine the characteristics of the comparison distribution 4 Determine critical valuescutoffs 5 Calculate a test statistic 6 Make a decision What are the 3 assumptions 1 The dependent variables on the scale 2 Random selection 3 Normal sample distribution How do you change a Z score into a raw score X Z Score Standard DeviationMean Multiply the Z score times the standard deviation and add the mean How do you calculate Z score X Mean Standard Deviation X minus the mean divided by the standard deviation How do you calculate standard error Standard Deviation The square root of the sample number
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