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6 Cards in this Set
- Front
- Back
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t test vs Anova
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t-test
One Sample - Data is compared with a known standard Independent Samples - Data is compared between two independent groups Paired Samples - Compare paired data within a group ANOVA - Used when data is obtained from more than 2 groups - Also has Repeated measures for data collected at different times for the same subject. |
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Confounder Characteristics
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- Associated with Exposure
- Associated with Oucome - However, it's not within the causal pathway and not a consequence of exposure or outcome |
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Risk Ratio
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Always a positive value
- Ranges from 0 to infinity - 1 means no risk - RR>1 = Exposed have higher risk compared to unexposed - RR<1 = Exposed have lower risk for outcome a/a+b / c/c+d |
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Odds Ratio
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- Ranges from 0 to infinity
- Null value is 1 ad/bc |
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Risk Ratio vs Odds Ratio
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Odds is an approximation of risk ration when outcome is rare
- Case control: Odds Ratio - Cohort Study: Risk Ratio |
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Homoscedasticity
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Variances along the best fit line remain similar as you move alone the line
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