est.power {SurrogateRank}

Estimated power to detect a valid surrogate

Description

Calculates the estimated power to detect a valid surrogate given a total sample size and specified alternative

Usage

est.power(n.total, rho = 0.8, u.y.alt, delta.alt, power.want.s = 0.7)

Arguments

n.total

total sample size in study

rho

rank correlation between Y and S in group 0, default is 0.8

u.y.alt

specified alternative for u.y

delta.alt

specified alternative for u.s

power.want.s

desired power for u.s, default is 0.7

Value

estimated power

Author(s)

Layla Parast

Examples

est.power(n.total = 50, rho = 0.8, u.y.alt=0.9, delta.alt = 0.1)