Hi all,
   I want to add the red color under the standard normal curve to the right
of 1.96.
Can anyone give me a hand? Please see the code below.
   Thank you.


x <- seq(-4, 4, length=100)
hx <- dnorm(x)
par(pty="s")
plot(x, hx, type="l", xlab="z value",
  ylab="Density", main="density of N(0,1)")
abline(v=1.96, col="red")

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