import excel "C:\Users\paola.rebora\Downloads\freshmen.xlsx", sheet("Sheet1") firstrow
codebook
summarize
tabulate weight
tabulate weight
graph box weight
graph box weight, over(gender)
histogram weight
histogram weight, width(10) start(50) fraction
graph pie, over(gender)
graph hbar, over(gender)

egen float weightclass = cut(weight), at(50(10)100)

 sort weightclass 
  cumul weightclass, gen(cu_weightclass)
  line cu_weightclass weightclass,connect( stairstep)