Statistics MATH-1530-004 Final Exam Part 1 Questions And Answers

Statistics MATH-1530-004 Final Exam
Part 1 Questions And Answers

.gAgnumbergwithg60%gofgthegdatagabovegitgis

A.gTheg35thgpercentile
B.gTheg65thgpercentile
C.gTheg40thgpercentile
D.Theg60thgpercentileg-gCORRECTggANSWER-C.

.gThegdistributiongofgtestgscoresgingaglargegstatisticsgclassgisgapproximatelygnormalgwithgme
ang75gpointsgandgstandardgdeviationg8gpoints.gApproximatelygwhatgpercentagegofgstudents
ghavegscoregmoregthang91gpoints?

A.g16g%
B.g2.5g%
C.g0.15g%
D.68g%g-gCORRECTggANSWER-B.

.Approximatelygfiftygpercentgofgthegobservationsgwillgbegabovegthe
A)maximum.
B)mean.
C)median.
D)gthirdgquartile.g-gCORRECTggANSWER-C.

Agbaggcontainsg4gredgmarbles,g3gbluegmarbles,gandg9ggreengmarbles.gWhatgisgthegprobabili
tygthatgagrandomlygselectedgmarblegisgblue?
A.g3/7
B.g3/16
C.g¼
D.g9/36g-gCORRECTggANSWER-B.

Aggraphicalgdevicegthatghighlightsgtheghighestgandglowestgvaluesgingagdatagset,galonggwithga
gnumbergofgothergkeygobservationsgingangorderedgarraygofgthegdata,gsuchgasgthegthirdgquartil

e,gthegmiddlegvalueg(orgmedian),gandgthegfirstgquartile,gisgcalled:
A.gagboxplot
B.gagfive-numbergsummary

,C.gaghistogram
D.gagstem-and-leafgplotg-gCORRECTggANSWER-A.

Agnumbergwithg65%gofgthegdatagbelowgitgis

A.gTheg35thgpercentile
B.gTheg65thgpercentile
C.gTheg40thgpercentile
D.gTheg60thgpercentileg-gCORRECTggANSWER-B.

AgstudygconductedgbygthegCentergforgPopulationgEconomicsgatgthegUniversitygofgChicagogs
tudiedgthegbirthgweightgofg621gbabiesgborngingNewgYork.gThegmeangweightgwasg3234ggram
sgwithgagstandardgdeviationgofg871ggrams.gAssumegthatgbirthgweightgdatagaregapproximatel
ygbellg-
gshaped.gUsinggthegEmpiricalgRule,gestimategthegpercentagegofgnewbornsgwhosegweightgw

asglessgthang1492ggramsgandggreatergthang4976ggrams.
A.g68%
B.g95%
C.g5%
D.g99.7%g-gCORRECTggANSWER-C.

AgstudygconductedgbygthegCentergforgPopulationgEconomicsgatgthegUniversitygofgChicagogs
tudiedgthegbirthgweightgofg621gbabiesgborngingNewgYork.gThegmeangweightgwasg3234ggram
sgwithgagstandardgdeviationgofg871ggrams.gAssumegthatgbirthgweightgdatagaregapproximatel
ygbellg-
gshaped.gUsinggthegEmpiricalgRule,gestimategthegpercentagegofgnewbornsgwhosegweightgw

asglessgthang1492ggrams.
A.g68%
B.g95%
C.g99.7%
D.g2.5g%g-gCORRECTggANSWER-D.

AgstudygconductedgbygthegCentergforgPopulationgEconomicsgatgthegUniversitygofgChicagogs
tudiedgthegbirthgweightgofg621gbabiesgborngingNewgYork.gThegmeangweightgwasg3234ggram
sgwithgagstandardgdeviationgofg871ggrams.gAssumegthatgbirthgweightgdatagaregapproximatel
ygbellg-
gshaped.gUsinggthegEmpiricalgRule,gestimategthegpercentagegofgnewbornsgwhosegweightgw

asglessgthang2363ggrams.
A.g68%
B.g95%
C.g16%
D.g84%g-gCORRECTggANSWER-C.

Angoutliergwillgusuallyghavegaglargegeffectgongthe
A)firstgquartile.
B)gmean.

, C)thirdgquartile.
D)median.g-gCORRECTggANSWER-B.

Byginspection,gdeterminegwhichgofgthegfollowinggsetsgofgnumbersghasgthegsmallestgstandar
dgdeviation.
A.g2,g3,g4,g5
B.g4,g4,g4,g5
C.g0,g0,g5,g5
D.g5,g5,g5,g5g-gCORRECTggANSWER-D.

Chapterg4gquestionsg-gCORRECTggANSWER-

Chapterg5gquestionsg-gCORRECTggANSWER-

Chapterg6gQuestionsg-gCORRECTggANSWER-

Collectiongofgsomegoutcomesgofgthegexperimentgisgcalled:
A.gSamplegspace
B.gEvent
C.gOutcome
D.gNonegofgtheseg-gCORRECTggANSWER-B.

Considergangexperimentgingwhichgeachgofgthreegcarsgexitinggfromgaguniversitygmaingentranc
egturnsgrightg(R)gorgleftg(L).gAssumegthatgagcargwillgturngrightgorgturngleftgwithgequalgprobabilit
ygofg1/2.gThegsamplegspacegSgisggivengby:
Sg=g{RRR,gRRL,gRLR,gRLL,gLRR,gLRL,gLLR,gLLL}
Determinegthegprobabilitygthatgexactlygtwogcarsgturngright.
A.g3/8
B.g4/8
C.g5/8
D.g7/8g-gCORRECTggANSWER-A.

Considergangexperimentgingwhichgeachgofgtwogcarsgexitinggfromgaguniversitygmaingentrance
gturnsgrightg(R)gorgleftg(L).gAssumegthatgagcargwillgturngrightgorgturngleftgwithgequalgprobabilityg

ofg1/2.gThegsamplegspacegSgisggivengby:
Sg=g{RR,gRL,gLR,gLL}
Determinegthegprobabilitygthatgexactlygonegcargturnsgright.
A.g1/4
B.g2/4
C.g3/4
D.gNonegofgtheseg-gCORRECTggANSWER-B.

Ifgagdiegisgrolledgonegtime,gsamplegspacegisggivengbygSg=g{1,g2,g3,g4,g5,g6}.gLetgAgbegthegeven
tgthatgagnumberglessgthang4gappears.gThengPg(A)gisggivengby:
A.g2/6
B.g3/6