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14 Cards in this Set
- Front
- Back
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continuous descrptive statm |
mean median, mode, variance, standard deviation |
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categorical |
prevalance, incidence rate, ratio |
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variance |
(x-median)^2/(n-1) |
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standard deviation |
(variance)^0.5 |
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proportion |
number of part over the number of total |
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rate |
comparison of two numbers with different unit |
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ratio |
comparison of numbers from two different group |
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prevalance |
number of disease/totals |
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sensitivity |
number of diseased people who screen positive/total number of disease |
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specificity |
number of healthy people who screen negative/total healthy people |
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incidence rate |
new disease/ total available |
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relative risk |
incidence rate of group1/group2 |
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odds, odd ratio yes/no II A B III C D |
odd= A/B, C/D, A/C, B/D odd ratio= A/B / C/D=AD/BC |
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confidence interval |
range of value that tries to quantify the uncertainty, check if interval contains a value of no change f null alue=0 for mean diference null value = 1 for ratio |
