CENTRAL TENDENCY AND VARIABILITY or - SAGE Publications Inc

So, the solution is simple and can be programmed as follows: mean(GSS2016$age, na.rm=TRUE) GSS2016$age[GSS2016$age==99]=NA Tip: The addition of the code na.rm=TRUE tells R to remove the unknown entries from the list that will be used to make calculations (in this case for the mean). 49.15576 ................
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