STAT 100 Lecture Notes - Lecture 12: Chi-Squared Distribution, Odds Ratio, Score Test
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6-8 related to exam 1: table 8. 1 and percentiles, interpreting empirical rule and identifying shape, random assignment vs. random selection, study exam 1. What is the risk a female cheats: 30/89. What is the probability a randomly selected student cheats: 39/127. Would this probability be considered subjective (opinion), classical (certain set of possibility), or relative frequency: relative frequency. What is the odds ratio for men having cheated compared to women: or= ratio of 2 odds. What would be the relative risk: risk of group 1/ risk of 2, males to females = females on bottom. What test would we use to analyze if a relationship exists between sex and cheating. Both categorical: use chi score test of independence. Null there is no relationship in population between sex and cheating. Alternative: there is a relationship in the population between sex and cheating. Conduct a test resulting in 0. 262 p-value. Fail to reject: reject if its less that . 05.
