rnorm(10,2,2)
rnorm(10,2,2)
x1=rnorm(10,2,2)
x2=rnorm(10,2,2)
x1
x2
mean(x1)
mean(x2)
sd(x1)
sd(x2)
(2.011546+2.601055)/2
quantile(x1,0.5)
quantile(x2,0.5)
pbeta(0.6,3,9)
pbeta(0.6,9,3)
?pbeta