set.seed(1234)
require(car)
xvar <- c(rnorm(100, 20, 5), rnorm (100, 30, 5))
# normal distribution
qqPlot(xvar, dist="norm")
require(car)
xvar <- c(rnorm(100, 20, 5), rnorm (100, 30, 5))
# normal distribution
qqPlot(xvar, dist="norm")
# t distribution with 20 df
qqPlot(xvar, dist="t", df=20)
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