# R_S Quiz #6.docx - R_S Quiz#5 Hypothesis Testing KNOW...

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R_S Quiz #5 Hypothesis Testing KNOW SYMBOLS FOR QUIZ (ON BACK) Null Hypothesis -hypothesis that is tested Alternative Hypothesis -hypothesis that expresses the resesrachers beliefs Significance Level -(alpha): probability of type 1 error (1-cc) Significance Testing - examines how likely differences between groups and relationships between variables occur by chance CC (confidence coeffiecient) -usually 95% in social science Calculated Value -a value that cuts off alpha in the tail (s) of a theoretical reference distribution Critical Value -alpha: used in hypothesis testing: alpha level is the maximum probability where you reject the null hypothesis if the null hypothesis is true: ex CC=90% so alpha=.10 Nondirectional Hypothesis -does not specify a particular direction of values for the parameters Directional Hypothesis -specifies a particular direction of values for the parameters One-Tail Test - use of only one tail of the sampling distribution Two-Tail Test -use of two tails of the sampling distribution Decision Making Rules - Reject -Retain Central Limit Theorem FORMULA: 2 Assumptions needed to run the formula(Short Answer) 1) Population is a normal distribution 2)

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• Fall '19
• Statistics, Statistical hypothesis testing, 5%, 90%