Topic 5 Quiz - Quiz PDF

Preview

Summary

Quiz...

Description

10/25/2017

Topic 5 Quiz

Student:_____________________ Date:_____________________

Instructor:MinShi Course:Fall2017MGMT3060.01

Assignment:Topic5Quiz

1. Naturalvariations: A. arethemanysourcesofvariationthatoccurwhenaprocessisundercontrol. B. aretolerated,withinlimits,whenaprocessisundercontrol. C. affectalmosteveryproductionprocess. D. whengrouped,formapattern,ordistribution. E. Alloftheabovearetrue. 2. Assignablecauses: A. arenotasimportantasnaturalcauses. B. dependontheinspectorassignedtothejob. C. arealsoreferredtoas"chance"causes. D. arecausesofvariationthatcanbeidentifiedandinvestigated. E. arewithinthelimitsofacontrolchart. 3. Controlchartsforvariablesarebasedondatathatcomefrom: A. acceptancesampling. B. individualitems. C. averagesoflargesamples. D. theentirelot. E. averagesofsmallsamples. 4. Thepurposeofanxbarchartistodeterminewhethertherehasbeena: A. changeinthepercentdefectiveinasample. B. changeinthecentraltendencyoftheprocessoutput. C. changeinthenumberofdefectsinasample. D. changeintheAOQ. E. changeinthedispersionoftheprocessoutput.

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

1/6

10/25/2017

Topic 5 Quiz

5. Thenumberofdefectsafterahotelroomcleaning(sheetsnotstraight,smearsonmirror,misseddebrisoncarpet,etc)shouldbemeasuredusingwhattypeofcontro chart? A. pchart B. Rchart C. cchart D. xbarchart E. eitherxbarchartorRchart 6. Thenumberoflateinsuranceclaimpayoutsper100shouldbemeasuredwithwhattypeofcontrolchart? A. xbarchart B. Rchart C. cchart D. pchart E. eitherpchartorcchart 7. RedTopCabCompanyreceivesmultiplecomplaintsperdayaboutdriverbehavior.Over9daystheownerrecordedthenumberofcallstobe3,0,8,9,6,7,4,9, and8.Whatistheuppercontrollimitforthe3sigmacchart? A. 9.03 B. 24.00 C. 0.00 D. 8.45 E. 13.35 8. Tensamplesofaprocessmeasuringthenumberofreturnsper100receiptsweretakenforalocalretailstore.Thenumberofreturnswere10,9,11,7,3,12,8,4,6, and11.Findthestandarddeviationofthesamplingdistributionforthepbarchart. A. Thereisnotenoughinformationtoanswerthequestion. B. .0863 C. 8.1 D. .081 E. .0273

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

2/6

10/25/2017

Topic 5 Quiz

9. Statisticalprocesscontrolcharts: A. indicatetotheoperatorthetruequalityofmaterialleavingtheprocess. B. displayupperandlowerlimitsforprocessvariablesorattributesandsignal whenaprocessisnolongerincontrol. C. displaythemeasurementsoneveryitembeingproduced. D. indicatetotheprocessoperatortheaverageoutgoingqualityofeachlot. E. areagraphicwayofclassifyingproblemsbytheirlevelofimportance,oftenreferred toasthe8020rule. 10. Amanagerwishestobuilda3sigmarangechartforaprocess.Thesamplesizeisfive,themeanofsamplemeansis16.01,andtheaveragerangeis5.3.From TableS6.1,theappropriatevalueofD is0,andD is2.115.WhataretheUCLandLCL,respectively,forthisrangechart? 3

4

A. 31.91and0.11 B. 33.9and0 C. 6.3and0 D. 11.2and0 E. 33.9and11.2 11. Tosetxbarchartupperandlowercontrollimits,onemustknowtheprocesscentralline,whichisthe: A. sizeofthepopulation. B. averagerange. C. percentdefectsinthepopulation. D. totalnumberofdefectsinthepopulation. E. averageofthesamplemeans. 12. Whichofthefollowingistrueofapchart? A. Thelowercontrollimitindicatestheminimumacceptablenumberofdefects. B. Thelowercontrollimitmaybeatzero. C. Thelowercontrollimitisthesameasthelottolerancepercentdefective. D. Thelowercontrollimitisfoundbysubtractingafractionfromtheaveragenumber ofdefects. E. ThelowercontrollimitequalsD timespbar. 3

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

3/6

10/25/2017

Topic 5 Quiz

13. Thecchartsignalswhethertherehasbeena: A. changeinthenumberofdefectsperunit. B. changeinthepercentdefectiveinasample. C. gainorlossinuniformity. D. changeintheAOQ. E. changeinthecentraltendencyoftheprocessoutput.

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

4/6

10/25/2017

Topic 5 Quiz

14. RefertoTableS6.1FactorsforComputingControlChartLimits(3sigma)1 forthisproblem. AutopistonsatWemmingChung'splantinShanghaiareproducedinaforgingprocess,andthediameterisacriticalfactorthatmustbecontrolled.Fromsample sizesof 10 pistonsproducedeachday,themeanandtherangeofthisdiameterhavebeenasfollows:                                                                  RangeR Meanx Day (mm) (mm) 1 2 3 4 5

156.9 153.2 155.6 157.5 158.6

4.4 4.4 4.3 4.8 4.5

a)Whatisthevalueofx? x=

156.36

mm(roundyourresponsetotwodecimalplaces).

b)WhatisthevalueofR? R=

4.48

mm(roundyourresponsetotwodecimalplaces).

c)Whatarethe UCLxand LCLxusing3sigma? UpperControlLimit( UCLx)=

157.74

mm(roundyourresponsetotwodecimalplaces).

LowerControlLimit( LCLx)=

154.98

mm(roundyourresponsetotwodecimalplaces).

d)Whatarethe UCLRand LCLRusing3sigma? UpperControlLimit( UCLR)=

7.96

mm(roundyourresponsetotwodecimalplaces).

LowerControlLimit( LCLR)=

1.00

mm(roundyourresponsetotwodecimalplaces).

1: Definition

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

5/6

10/25/2017

Topic 5 Quiz

Sample Size,n

MeanFactor, A2

UpperRange, D4

LowerRange, D3

2

1.880

3.268

0

3

1.023

2.574

0

4

0.729

2.282

0

5

0.577

2.115

0

6

0.483

2.004

0

7

0.419

1.924

0.076

8

0.373

1.864

0.136

9

0.337

1.816

0.184

10

0.308

1.777

0.223

12

0.266

1.716

0.284

15. TheresultsofinspectionofDNAsamplestakenoverthepast10daysaregivenbelow.Samplesizeis100.                                                                                                                                                          Day 1 2 3 4 5 6 7 8 9 10 Defectives 6 8 8 10 6 7 0 9 12 1 a)Theupperandlower 3sigmacontrolchartlimitsare: UCLp=

0.142

(enteryourresponseasanumberbetween0and1,roundedtothreedecimalplaces).

LCLp=    

0.000

(enteryourresponseasanumberbetween0and1,roundedtothreedecimalplaces).

b)Giventhelimitsinparta,istheprocessincontrolforthefollowingdaysasshowninthetablebelow? Day

NumberofDefects

InControl (1)

11

7

12

11

13

12

(2)

(3)

(1)

YES NO

(2)

NO

(3)

YES

https://xlitemprod.pearsoncmg.com/api/v1/print/en-us/om

YES NO

6/6...