ISDS 361A FINAL EXAM CONCEPT
QUESTIONS EXAM NEWEST ACTUAL
EXAM COMPLETE 150 QUESTIONS AND
CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW VERSION
2026!!!
usesmallmthemdatam(themmostmefficient)m-mCORRECTmANSWERmStandardmdeviation
Probabilitym-
mCORRECTmANSWERmlikelihoodmthatmamparticularmeventmwillmoccurlikelihoodmthatmthemrandommva
riablemtakesmvaluesmwithinmamparticularmrange.
coefficientmofmvariationmformulam-mCORRECTmANSWERmstandardmdeviation/mean
coefficientmofmvariationm-
mCORRECTmANSWERmAmmeasuremofmrelativemvariabilitymcomputedmbymdividingmthemstandardmdevi
ationmbymthemmeanmandmmultiplyingmbym100.
ifmthemmeanmordermdaysm(thatmis,maverage)maremsignificantlymdifferent?mInmthismcase,musemofmstand
ardmdeviationmmaymnotmbemeffectivemormapplicablembecausemthemcomparisonmwillmnotmbemvalidmso
muse
empiricalmrulemfrequencym-
mCORRECTmANSWERmApproximatelym68%mofmthemvaluesmaremwithinmonemstandardmdeviationmofmt
hemmean.Approximatelym95%mofmvaluesmaremwithinmtwomstandardmdeviationsmofmthemmean.Almo
stmallm(100%)mthemdatamvaluesmaremwithinmthreemstandardmdeviationsmofmhemmean
,WhenmthemdatamdoesmnotmresemblemNORMAL,mwemusem-
mCORRECTmANSWERmwhatmismknownmasmChebyshev'smTheoremminmplacemofmthemEmpiricalmrule.
ThemusemofmthemEmpiricalmrulemrequiresm-
mCORRECTmANSWERmthemdatamtomresemblemthemnormalmdistribution,mhasmtombemuni-
modal,msymmetric
Formzm>1,mChebyshev'smtheoremmstatesmthatm-
mCORRECTmANSWERmatmleastm(𝟏−𝟏/z^2)100%mofmthemdatamvaluesmmustmbemwithinmzmstandardmde
viationsmofmthemmean.
Chebyshev'smtheoremmismmoremflexiblemthan
themEmpiricalmrulembecausem-
mCORRECTmANSWERmitmappliesmtomanymdatamdistribution.mHowever,mitmismlessmprecise.
DomnotmusemEmpiricalmrulem-mwhenm-
mCORRECTmANSWERmThemdistributionmismskewedThemdistributionmhasmmoremthanmonemmode
OutliermdetectionmusingmthemEmpiricalmRulem-mCORRECTmANSWERmanymvaluemwithmamz-
scoremvaluembelowm-
3mormmoremthanm3mmaymbemconsideredmanmoutlier.mThemjustificationmismthat:mpermEmpiricalmRule,m
almostmallmvaluesmshouldmbemwithinm3mstandardmdeviationsmofmthemmean.mIfmnot,mthatmvaluemmust
mbemanmoutlier.
EmpiricalmRulem-mCORRECTmANSWERmWhenmthemshapemofmthemdistribution/histogrammismbell-
shapedm(moundmshaped)m,msymmetricmandmunimoda
z-scorem-
mCORRECTmANSWERmammeasuremofmhowmmanymstandardmdeviationsmyoumaremawaymfrommthemnor
mm(averagemormmean)
, (x-mean)/standardmdeviation
Mostmcommonmmeasuresmofmvariability:m-mCORRECTmANSWERmStandardmdeviationmandmCV
Themcollectionmofmallmunitsmofminterestminmamparticularmstudymismcalled
a.mSample
b.mParameter
c.mPopulation
d.mStatisticm-mCORRECTmANSWERmPopulation
3mwaysmofmmeasuringmvariabilitym-mCORRECTmANSWERmSDmIQRmrange
quartilempercentagesm-mCORRECTmANSWERmQ1-m25%Q2-50%Q3-75%
Statisticsm-
mCORRECTmANSWERmismamwaymtomgetmINFORMATIONmfrommDATAUsingmSTATISTICSmwemdrawmconcl
usionsm(playsmamroleminmmakingmsensemofmcomplexmdatambymextractingmusefulminformation.)mfromm
data.
Samplemproportion;mp m̅ -
mCORRECTmANSWERmp ̅mismthempointmestimatormormsamplemstatisticmformthempopulationmparamete
r
p ̅=x/n
Samplingmdistributionmofmp ̅m:
ismsimplymthemcollectionmofmallmpossiblemvaluesmofmp ̅
QUESTIONS EXAM NEWEST ACTUAL
EXAM COMPLETE 150 QUESTIONS AND
CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW VERSION
2026!!!
usesmallmthemdatam(themmostmefficient)m-mCORRECTmANSWERmStandardmdeviation
Probabilitym-
mCORRECTmANSWERmlikelihoodmthatmamparticularmeventmwillmoccurlikelihoodmthatmthemrandommva
riablemtakesmvaluesmwithinmamparticularmrange.
coefficientmofmvariationmformulam-mCORRECTmANSWERmstandardmdeviation/mean
coefficientmofmvariationm-
mCORRECTmANSWERmAmmeasuremofmrelativemvariabilitymcomputedmbymdividingmthemstandardmdevi
ationmbymthemmeanmandmmultiplyingmbym100.
ifmthemmeanmordermdaysm(thatmis,maverage)maremsignificantlymdifferent?mInmthismcase,musemofmstand
ardmdeviationmmaymnotmbemeffectivemormapplicablembecausemthemcomparisonmwillmnotmbemvalidmso
muse
empiricalmrulemfrequencym-
mCORRECTmANSWERmApproximatelym68%mofmthemvaluesmaremwithinmonemstandardmdeviationmofmt
hemmean.Approximatelym95%mofmvaluesmaremwithinmtwomstandardmdeviationsmofmthemmean.Almo
stmallm(100%)mthemdatamvaluesmaremwithinmthreemstandardmdeviationsmofmhemmean
,WhenmthemdatamdoesmnotmresemblemNORMAL,mwemusem-
mCORRECTmANSWERmwhatmismknownmasmChebyshev'smTheoremminmplacemofmthemEmpiricalmrule.
ThemusemofmthemEmpiricalmrulemrequiresm-
mCORRECTmANSWERmthemdatamtomresemblemthemnormalmdistribution,mhasmtombemuni-
modal,msymmetric
Formzm>1,mChebyshev'smtheoremmstatesmthatm-
mCORRECTmANSWERmatmleastm(𝟏−𝟏/z^2)100%mofmthemdatamvaluesmmustmbemwithinmzmstandardmde
viationsmofmthemmean.
Chebyshev'smtheoremmismmoremflexiblemthan
themEmpiricalmrulembecausem-
mCORRECTmANSWERmitmappliesmtomanymdatamdistribution.mHowever,mitmismlessmprecise.
DomnotmusemEmpiricalmrulem-mwhenm-
mCORRECTmANSWERmThemdistributionmismskewedThemdistributionmhasmmoremthanmonemmode
OutliermdetectionmusingmthemEmpiricalmRulem-mCORRECTmANSWERmanymvaluemwithmamz-
scoremvaluembelowm-
3mormmoremthanm3mmaymbemconsideredmanmoutlier.mThemjustificationmismthat:mpermEmpiricalmRule,m
almostmallmvaluesmshouldmbemwithinm3mstandardmdeviationsmofmthemmean.mIfmnot,mthatmvaluemmust
mbemanmoutlier.
EmpiricalmRulem-mCORRECTmANSWERmWhenmthemshapemofmthemdistribution/histogrammismbell-
shapedm(moundmshaped)m,msymmetricmandmunimoda
z-scorem-
mCORRECTmANSWERmammeasuremofmhowmmanymstandardmdeviationsmyoumaremawaymfrommthemnor
mm(averagemormmean)
, (x-mean)/standardmdeviation
Mostmcommonmmeasuresmofmvariability:m-mCORRECTmANSWERmStandardmdeviationmandmCV
Themcollectionmofmallmunitsmofminterestminmamparticularmstudymismcalled
a.mSample
b.mParameter
c.mPopulation
d.mStatisticm-mCORRECTmANSWERmPopulation
3mwaysmofmmeasuringmvariabilitym-mCORRECTmANSWERmSDmIQRmrange
quartilempercentagesm-mCORRECTmANSWERmQ1-m25%Q2-50%Q3-75%
Statisticsm-
mCORRECTmANSWERmismamwaymtomgetmINFORMATIONmfrommDATAUsingmSTATISTICSmwemdrawmconcl
usionsm(playsmamroleminmmakingmsensemofmcomplexmdatambymextractingmusefulminformation.)mfromm
data.
Samplemproportion;mp m̅ -
mCORRECTmANSWERmp ̅mismthempointmestimatormormsamplemstatisticmformthempopulationmparamete
r
p ̅=x/n
Samplingmdistributionmofmp ̅m:
ismsimplymthemcollectionmofmallmpossiblemvaluesmofmp ̅