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14 Cards in this Set
- Front
- Back
equation for cv
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sd/mean
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equation for sd
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sq root of variance
variance: sum (mean-x1)^2 then divide by n-1 |
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Se
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sd/sq root of n
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if comparing two populations (ones with dz ones without) what test type
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x2
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if have 2x2 table but one or more cells have fewer than 5 cts, what use
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fisher exact if gaussian
mann-whitney if nonparametric |
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if comparing two distributions (such as determining cutoff values) use what test
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student's t - one tailed or two tailed
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if comparing performance of two analyzers (i.e. two data sets) use
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paired t or correlations
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def of analytical accuracy
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difference (bias) btwn true result and analytical result and assurance that this does not exceed acceptable limits
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calcu of bias
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bias = absolute value of true-analytical result is less than or equal to defined limit
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value of f test
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to see if one analyzer is more precise than another
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what is a bland altman plot
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difference between two data sets with Y-bias; x-reference method
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what is proportional bias
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fixed % bias
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what is constant bias
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fixed amt of bias
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what are the axes of a roc curve
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Y= sensitivity
X=1-specificity |