CCJ 4700 Exam 2 Stewart With Verified
Answers
What fare fthe f3 fcomponents fof fa fclassical fexperiment? f- fCORRECT✅✅1)Pre f&
fPost-Testing
2)Experimental f& fControl fgroups
3)Random fAssignment
____________ fAssignment fIs fa fcentral ffeature fof fthe fclassical fexperiment f-
fCORRECT✅✅Random fAssignment
Random fassignment... f- fCORRECT✅✅Reduces fsources fof fbias f& fCreates
fequivalent fgroups
Criteria ffor fcausality: f- fCORRECT✅✅1)Cause fmust fcome fbefore feffect
2)We fhave fto fshow fcause(x) fcame fbefore feffect(y)
3)We fhave fto frule fout frival fexplanations
Threats fto finternal fvalidity: f- fCORRECT✅✅-History(past fevents fmay fconfound
fresults)
-Testing(Retesting finfluences fpeoples fbehavior)
-Selection fBias(volunteers fmay fchoose fto fparticipate fin fcertain fstudy)
Why fdo fwe fuse fsampling? f- fCORRECT✅✅Bc... fIts foften fnot fpossible fto fcollect finfo
ffrom fall fpersons fwe fwish fto fstudy f& fIts foften fnot fnecessary
Two fthings fto fdo fwhen fselecting fsamples: f- fCORRECT✅✅Select fsamples fto
frepresent fa flarger fpop. fof fpeople/things f& fgeneralize ffrom fa fsample fto fan
funobserved fpopulation fthe fsample fis fintended fto frepresent
When fis fa fsample f"representative" fof fthe fpopulation? f- fCORRECT✅✅When fthe
faggregate fcharacteristics fof fthe fsample fclosely fapprox. fthose fsame fcharacteristics fin
fthe fpopulation
2 fadv. fof fpopulation fsamples: f- fCORRECT✅✅-Typically fmore frepresentative fthan
fother ftypes fof fsamples fbecause fthey favoid fbiases
-Permits fus fto festimate fthe faccuracy fof fthe fsample
Why fis fstandard ferror fimportant? f- fCORRECT✅✅Bc fit findicates fhow fclosely fthe
fsample festimates fwill fbe fdistributed faround fthe fpopulation fparameter
As fsample fsize fincrease f---> fStandard ferror f_______ f- fCORRECT✅✅Decreases
, If fsample fsize fis fquadrupled fthen fstandard ferror fis: f- fCORRECT✅✅Reduced fby f1/2
What fis fthe fsampling fFrame? f- fCORRECT✅✅List fof fthe fpopulation fthat fone fis
finterested fin fstudying
What fare fthe ftypes fof fprobability fsamples? f- fCORRECT✅✅-SRS
-Systematic
-Stratified
-Cluster
SRS f- fCORRECT✅✅Number fis fassigned fto feach fmember fin fthe fframe fand fthen fa
frandom fnumber fgenerator fselects felements
Systematic f- fCORRECT✅✅You frandomly fselect fevery fnth fnumber fon fa flist
(researchers fuse fthis fwhen fa flist fis favailable)
Stratified f(Proportionate) f- fCORRECT✅✅First fdivide fthe fpopulation finto fstrata fand
fthen fchoose fyour fsample
Stratified f(Disproportionate) f- fCORRECT✅✅You fover fsample fcertain fgroups
When fis fCluster fsampling fused? f- fCORRECT✅✅Used fwhen fits fimpractical fto
fcreate fa flist fof fthe ftarget fpopulation
What fare fthe ftypes fof fnon-probability fsampling? f- fCORRECT✅✅-Purposive f
-Quota
-Convenience
-Snowball
Purposive f- fCORRECT✅✅Chose fa fsample fbased fon fthe fjudgement fand fthe
f"purpose" fof fthe fstudy
Quota f- fCORRECT✅✅Researchers ftry fto fmake fsure fthat fthe fsample fhas fthe
fdesired fproportion fof fage, fsex, fetc. f(The fresearchers fuse fjudgement frather fthan
fprobability fwhen fselecting fsamples)
Convenience f- fCORRECT✅✅Researchers frely fon favailability
Snowball f- fCORRECT✅✅Get fone fsubject fwho fidentifies fwith fother fpotential
fsubjects fand fso fon
Surveys fmay fbe fused ffor: f- fCORRECT✅✅Descriptive, fexplanatory, fexploratory, fand
fapplied fresearch
What ftopics fare fappropriate ffor fsurvey fresearch? f- fCORRECT✅✅-Counting fCrime
Answers
What fare fthe f3 fcomponents fof fa fclassical fexperiment? f- fCORRECT✅✅1)Pre f&
fPost-Testing
2)Experimental f& fControl fgroups
3)Random fAssignment
____________ fAssignment fIs fa fcentral ffeature fof fthe fclassical fexperiment f-
fCORRECT✅✅Random fAssignment
Random fassignment... f- fCORRECT✅✅Reduces fsources fof fbias f& fCreates
fequivalent fgroups
Criteria ffor fcausality: f- fCORRECT✅✅1)Cause fmust fcome fbefore feffect
2)We fhave fto fshow fcause(x) fcame fbefore feffect(y)
3)We fhave fto frule fout frival fexplanations
Threats fto finternal fvalidity: f- fCORRECT✅✅-History(past fevents fmay fconfound
fresults)
-Testing(Retesting finfluences fpeoples fbehavior)
-Selection fBias(volunteers fmay fchoose fto fparticipate fin fcertain fstudy)
Why fdo fwe fuse fsampling? f- fCORRECT✅✅Bc... fIts foften fnot fpossible fto fcollect finfo
ffrom fall fpersons fwe fwish fto fstudy f& fIts foften fnot fnecessary
Two fthings fto fdo fwhen fselecting fsamples: f- fCORRECT✅✅Select fsamples fto
frepresent fa flarger fpop. fof fpeople/things f& fgeneralize ffrom fa fsample fto fan
funobserved fpopulation fthe fsample fis fintended fto frepresent
When fis fa fsample f"representative" fof fthe fpopulation? f- fCORRECT✅✅When fthe
faggregate fcharacteristics fof fthe fsample fclosely fapprox. fthose fsame fcharacteristics fin
fthe fpopulation
2 fadv. fof fpopulation fsamples: f- fCORRECT✅✅-Typically fmore frepresentative fthan
fother ftypes fof fsamples fbecause fthey favoid fbiases
-Permits fus fto festimate fthe faccuracy fof fthe fsample
Why fis fstandard ferror fimportant? f- fCORRECT✅✅Bc fit findicates fhow fclosely fthe
fsample festimates fwill fbe fdistributed faround fthe fpopulation fparameter
As fsample fsize fincrease f---> fStandard ferror f_______ f- fCORRECT✅✅Decreases
, If fsample fsize fis fquadrupled fthen fstandard ferror fis: f- fCORRECT✅✅Reduced fby f1/2
What fis fthe fsampling fFrame? f- fCORRECT✅✅List fof fthe fpopulation fthat fone fis
finterested fin fstudying
What fare fthe ftypes fof fprobability fsamples? f- fCORRECT✅✅-SRS
-Systematic
-Stratified
-Cluster
SRS f- fCORRECT✅✅Number fis fassigned fto feach fmember fin fthe fframe fand fthen fa
frandom fnumber fgenerator fselects felements
Systematic f- fCORRECT✅✅You frandomly fselect fevery fnth fnumber fon fa flist
(researchers fuse fthis fwhen fa flist fis favailable)
Stratified f(Proportionate) f- fCORRECT✅✅First fdivide fthe fpopulation finto fstrata fand
fthen fchoose fyour fsample
Stratified f(Disproportionate) f- fCORRECT✅✅You fover fsample fcertain fgroups
When fis fCluster fsampling fused? f- fCORRECT✅✅Used fwhen fits fimpractical fto
fcreate fa flist fof fthe ftarget fpopulation
What fare fthe ftypes fof fnon-probability fsampling? f- fCORRECT✅✅-Purposive f
-Quota
-Convenience
-Snowball
Purposive f- fCORRECT✅✅Chose fa fsample fbased fon fthe fjudgement fand fthe
f"purpose" fof fthe fstudy
Quota f- fCORRECT✅✅Researchers ftry fto fmake fsure fthat fthe fsample fhas fthe
fdesired fproportion fof fage, fsex, fetc. f(The fresearchers fuse fjudgement frather fthan
fprobability fwhen fselecting fsamples)
Convenience f- fCORRECT✅✅Researchers frely fon favailability
Snowball f- fCORRECT✅✅Get fone fsubject fwho fidentifies fwith fother fpotential
fsubjects fand fso fon
Surveys fmay fbe fused ffor: f- fCORRECT✅✅Descriptive, fexplanatory, fexploratory, fand
fapplied fresearch
What ftopics fare fappropriate ffor fsurvey fresearch? f- fCORRECT✅✅-Counting fCrime
