ss.fromdata.nvar
(Package: ssanv) :
Find sample sizes when normal standard deviation is estimated from data
Calculate sample sizes for two-sample differences in normal means when the standard deviation (or variance) is estimated from existing data.
● Data Source:
CranContrib
● Keywords: htest
● Alias: ss.fromdata.nvar
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ss.nonadh
(Package: ssanv) :
Find sample sizes accounting for nonadherence
Calculate sample sizes needed for a two-sample difference in means test accounting for nonadherence (i.e., noncompliance) in a proportion of subjects.
● Data Source:
CranContrib
● Keywords: htest
● Alias: ss.nonadh
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Called by ss.fromdata.nvar. Finds calibrated beta (1-power) for use when estimating standard deviation from data in sample size calculations for differences in two normal means.
● Data Source:
CranContrib
● Keywords: htest
● Alias: find.calibrated.beta
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Calculate sample size for two sample difference in means tests. The function, ss.nonadh accounts for known proportions of nonadherence. There are three functions that calculate sample size accounting for the variability that comes from estimating parameters from data.
● Data Source:
CranContrib
● Keywords: htest
● Alias: ssanv, ssanv-package
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ss.fromdata.pois
(Package: ssanv) :
Find sample sizes when 2 Poisson means are estimated from data
Calculate sample sizes for two-sample differences in Poisson means when means are estimated from existing data
● Data Source:
CranContrib
● Keywords: htest
● Alias: ss.fromdata.pois
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ss.fromdata.neff
(Package: ssanv) :
Find sample sizes when normal standardized difference is estimated from data
Calculate sample sizes for two-sample differences in normal means when standardized difference is estimated from existing data
● Data Source:
CranContrib
● Keywords: htest
● Alias: ss.fromdata.neff
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uniroot.integer
(Package: ssanv) :
Find the root of a function to the nearest integer
Let f be a monotonic function that changes sign within the interval specified. If f(i)=0 for some i within the interval specified (including the ends of the interval), then the root is i. Otherwise if pos.side=TRUE (or FALSE) then uniroot.integer finds the integer i such that f(i) is closest to the sign change and is positive (or negative).
● Data Source:
CranContrib
● Keywords: htest
● Alias: uniroot.integer
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