One inherentweaknessofthenonparametriccontrolchartsisthatthesignalingeventsarenotindependentandthereforethe
ARL of thechartcannotbecalculatedasthereciprocalofthesignalingprobability.However,onecanmakeuseofanappropriate
conditioning argument(see Chakraborti, 2000) toestablishaformulafortheexactrunlengthdistributionanditsmean.
In viewof(4)and(5)itisclearthat,underthecondition Xa:b = (xa, xa+1, ..., xb) = xa:b ∈ Rb−a+1, thewaitingtimerandom
variable N which describesthenumberof Y-samples untilanout-of-controlalarmissuedfollowsageometricdistributionwith
success probability
One inherentweaknessofthenonparametriccontrolchartsisthatthesignalingeventsarenotindependentandthereforetheARL of thechartcannotbecalculatedasthereciprocalofthesignalingprobability.However,onecanmakeuseofanappropriateconditioning argument(see Chakraborti, 2000) toestablishaformulafortheexactrunlengthdistributionanditsmean.In viewof(4)and(5)itisclearthat,underthecondition Xa:b = (xa, xa+1, ..., xb) = xa:b ∈ Rb−a+1, thewaitingtimerandomvariable N which describesthenumberof Y-samples untilanout-of-controlalarmissuedfollowsageometricdistributionwithsuccess probability
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หนึ่ง
ของ
อาร์กิวเมนต์ (ดู Chakraborti, 2000) toestablishaformulafortheexactrunlengthdistributionanditsmean
ใน viewof (4) และ (5) itisclearthat, underthecondition Xa: b = (XA, XA + 1, ... , XB) = XA: b ∈ RB-+ 1, thewaitingtimerandom
ยังไม่มีตัวแปรซึ่ง describesthenumberof Y-ตัวอย่าง untilanout ของ controlalarmissuedfollowsageometricdistributionwith
น่าจะประสบความสำเร็จ
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