ppv: Positive Predictive Value

In erictleung/poofsi: Learn concepts from Nature's "Points of Significance"

Description

Calculates positive predictive value given the effect size, power, and alpha level.

Usage

ppv(effectSize, power, alpha)

Arguments

effectSize	the quantitative measure of the strength of a phenomenon in an experiment, between 0 and 1
power	probability that the test correctly rejects the null hypothesis when the alternative hypothesis is true
alpha	false positive value or Type I error

Details

The positive predictive value is the fraction of true positives out of positive labeled classes (i.e. true positive and false positive).

Value

positive predictive value

References

Krzywinski, Martin, and Naomi Altman. "Points of significance: Power and sample size." Nature Methods 10.12 (2013): 1139-1140.

Examples

ppv(effectSize = 0.5, power = 0.2, alpha = 0.05)
ppv(effectSize = 0.5, power = 0.5, alpha = 0.05)
ppv(effectSize = 0.5, power = 0.8, alpha = 0.05)

erictleung/poofsi documentation built on May 16, 2019, 8:41 a.m.