[R] How to superimpose a histogram and density plot

[Bill Simpson]

>     PD> "Venables, Bill (CMIS, Cleveland)" <Bill.Venables at cmis.CSIRO.AU>
>     PD> writes:
>     >> The fact that every elementary book on statistics does it this way
>     >> does not make it correct.  To be helpful, a histogram really has to
>     >> be a non-parametric density estimator, period.
Not EVERY elem stats book.  The best (IMHO) intro stats book (Freedman 
et al) does it right--it ONLY uses histograms with a density y axis. I
used this book to teach stats to psych majors for several yrs.

Freedman, Pisani, Purves, Adhikari (1991) Statistics. Norton ISBN
0-393-96043-9

I think there is a newer 3rd ed.

Bill S

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