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library(UsingR)

## Loading required package: MASS

## Loading required package: HistData

## Loading required package: Hmisc

## 
## Attaching package: 'Hmisc'

## The following objects are masked from 'package:base':
## 
##     format.pval, units

library(MASS)

hist(brightness, prob=TRUE)
lines(density(brightness))

boxplot(brightness)