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Inthefollowingexample,acompanycollecteddataregardingcommutingtimesovera10-weekperiod.Theythencalculatedtheaveragecommuteperweek(X)andtherangefromtheshortesttothelongestcommute(R).CommutingTimes(minutesperday)Week12345678910559010070557512065701007595751106585110658580656075659565659060658060656070658590656080556560706570607580_X=71727673717190747177R=25403550402055302540=__Thecompanycalculatedt...
QuantitativeUnitsofMeasurement__Calculatetheaverage(X)andrange(R)ofeachsubgroup:__X=theaverageX1.....Xn=eachobservationn=#ofobservationssampledR=Xmax-Xmin__=Calculatetheaveragerange(R)andtheprocessaverage(X):k=#ofsubgroups(20to25groups)CalculatetheControlLimits:QualitativeUnitsofMeasurementThepChart=Proportionofsamplewhichisdefective.Attimes,wemayclassifyadefectiveitemasacceptable.Whenthisoccur...
