Question: 1. Use cs=read.table(Concr.Strength.1s.Data.txt, header =T) to read into the R object cs data on 28-day compressive-strength measurements of concrete cylinders using water/cement ratio 0.4.8 Then

1. Use cs=read.table(”Concr.Strength.1s.Data.txt”, header =T) to read into the R object cs data on 28-day compressive-strength measurements of concrete cylinders using water/cement ratio 0.4.8 Then use the commands attach(cs); hist(Str, freq=FALSE);

lines(density(Str)); stem(Str) to produce a histogram with the smooth histogram superimposed, and a stem and leaf plot.

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