Odds ratio to percentage calculator
[DOCX File]Contingency Table Analysis in SAS
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With the overweight people, phi is much larger, .33, and the odds ratio is .0409/.3844 = 9.4. With the normal (and skinny) people, phi is not so large, .22, and the odds ratio is .3010/.0822 = 3.7. The percentage use of the stairs (14%) was about the same in the …
[DOC File]The Toolbox Revisted: Paths to Degree Completion from High ...
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In both cohorts, the odds ratio says that every step up the math ladder multiplies the odds of earning a bachelor’s degree by roughly 2.5 versus an odds ratio for each step up the socioeconomic status quintile measure of 1.68 (for the class of 1982) and 1.78 (for the class of 1992). These data are statistically significant (p
[DOC File]Sample Test Questions -- Test 1 - University of Florida
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A. Use your calculator. B Since it follows the standard normal distribution, the standard deviation(s) equals to one. S= variance = 1. A. Z= (42-50)/10=-0.8. Enter table A under Z=-0.8. The table entry is 0.2119. This is the area to the left of –0.8. Because the total area under the curve is 1, the area lying to the right of –0.8 is 1-0 ...
[DOC File]Rossman/Chance
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The odds ratio and relative risk are closely related. Again consider the following generic two-way table classifying whether a person smokes and whether he/she has a disease: Smoker Non-smoker Disease A B No Disease C D Let be the proportion of success in the smoker group, and let be the proportion of success in the non-smoker group.
Statement of Problem:
Various experts have recommended an alternative, the odds ratio, as a superior indicator (Gastwirth, 1984, p.84). The odds ratio is easy to calculate from a 2x2 table, and it has some major advantages over the selection ratio and other comparative measures for tabulated counts (Reynolds, 1977, pp.20-28; Selvin, 1996, pp.428-432; Agresti, 1996 ...
[DOC File]Guide to calculating, interpreting and using effect size
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Finally, a common effect size measure widely used in medicine is the ‘odds ratio’. This is appropriate where an outcome is dichotomous: success or failure, a patient survives or does not. Explanations of the odds ratio can be found in a number of medical statistics texts, including Altman (1991), and in …
[DOC File]Unit 4 Practice Questions
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Calculate the odds ratio of the above study. OR = = 4.15. 1b. Interpret the measure of association. The odds ratio is greater than 1.0, therefore Tamoxifen is a risk factor for uterine cancer. People that use Tamoxifen have a 4.15 times greater risk of developing uterine …
[DOCX File]Academic Support Evaluation Final Report
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For example, an odds ratio of 1.3 for Competency Determination means that participants were 1.3 times as likely as non-participants to gain their Competency Determination. An odds ratio of 0.7 for dropout status means that participants were 0.7 times as likely to drop out as similar non-participants.
[DOC File]Power and Sample Size
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Sample size for estimating odds ratio: again a formula. I’m not going to go through that since we’re kind of running out of time here – just an example of that. Occasionally we have an interesting study where we want a sample size for a rare event where the goal is to estimate the probability of a rare event.
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