library(TeachingDemos)
power.examp(diff = 4, stdev = 1, alpha = .05, n = 10)
power.examp(diff = 4, stdev = 1, alpha = .05, n = 10)
power.examp(diff = 4, stdev = 1, alpha = .05, n = 10)
power.examp(diff = 4, stdev = 1, alpha = .05, n = 10)
power.examp(diff = .1, stdev = 1, alpha = .05, n = 10)
power.examp(diff = .5, stdev = 1, alpha = .05, n = 10)
1.64 - sqrt(20)/30
1-pnorm(1.49)
1.64 - 10*sqrt(20)/30
1.64 - 10*sqrt(20)/30
1-pnorm(.15)
1.64 - 20*sqrt(20)/30
1-pnorm(-1.34)
1.64*30/sqrt(20)
1.64*30/sqrt(200)
qnorm(.2)
30*(1.64 + .84)/sqrt(20)
30*(1.64 + .84)/sqrt(30)
30*(1.64 + .84)/sqrt(100)
30*(1.64 + .84)/sqrt(200)
30*(1.64 + .84)/sqrt(300)
30*(1.64 + .84)/sqrt(10000)
30*(1.64 + .84)/sqrt(100)
30^2*(-.84-1.64)^2/2^2
30^2*(-.84-1.64)^2/1^2
30^2*(-.84-1.64)^2/.5^2
30^2*(-.84-1.64)^2/10^2
30^2*(-.84-1.64)^2/10^2
30^2*(-.84-1.64)^2/8^2
30^2*(-.84-1.64)^2/.1^2
30^2*(-.84-1.64)^2/10^2
install.packages("TeachingDemos")
library(TeachingDemos)
power.examp()
power.examp(diff=.1)
power.examp(diff=.1,n =1)