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MATH120: FINAL EXAM QUESTIONS AND ANSWERS
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MATH120: FINAL EXAM QUESTIONS AND ANSWERS
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MATH120 FINAL EXAM STUDY GUIDEQUESTIONS AND ANSWERS
Whilesconductingsascompanyssurvey,sansHRsteamsmembersaskssrespondentsstosdescribest
heirswork-lifesbalance.sThissdatasissasformsofs-sans--QualitiativesData
Whilesconductingsascompanyssurvey,sansHRsteamsmembersaskssrespondentsstosrankshowst
heysfeelsfromsstronglysagreestosstronglysdisagree.sThissdatasissasformsofs-sans--
QualitiativesData
Whilesconductingsascompanyssurvey,sansHRsteamsmembersasksspeoplestosrankshowstheysf
eelsonsasfive-pointsscalesfromsstronglysagreestosstronglysdisagree.sThissdatasissasformsofs-
sans--QuantitativesData
Whichsofsthesfollowingsissnotsansexamplesofscontinuoussdata?s-sans--
Agesinsyearssassansinteger
Ansintervalsvariables-sans--
Issastypesofsquantitativesdatasthatshassansorder,sbutscannotsusesratiosstoscomparesdifferents
measurements.
Milesspershoursissansexamplesofs-sans--Asratiosvariable
Educationslevels(e.g.,shighsschool,sassociates,sbachelors,smasters)sissansexamplesofs-sans-
-Ansordinalsvariable
Educationslevels(e.g.,shighsschool,sassociates,sbachelors,smasters)sissansexamplesofs-sans-
-Thesentiressetsofsasgroupsofspeoplesbeingsstudied.
Asrepresentativessamplesiss-sans--
Assubsetsofsthespopulationsthatsissansaccuratesrepresentationsofsthespopulation.
Breakingsaspopulationsintosdistinctsgroupssthatssharescommonscharacterisicssandsthensran
domlyssamplingswithinsthosesgroupssissdescribedsass-sans--Stratifiedssampling
Onsasmathsexam,sasgroupsofs10sstudentssearnedsthesfollowingsscores:s73,s86,s84,s79,s86,s9
9,s91,s93,s87,sands96.sWhatsissthesaveragesscoresofsthesstudentssroundedstosthesneareststen
th?s-sans--87.4
Onsasmathsexam,sasgroupsofs10sstudentssearnedsthesfollowingsscores:s73,s86,s84,s79,s86,s9
9,s91,s93,s87,sands96.sWhatsissthesmediansscoresofsthesstudentssroundedstosthesneareststent
h?s-sans--86.5
, Onsasmathsexam,sasgroupsofs10sstudentssearnedsthesfollowingsscores:s73,s86,s84,s79,s86,s9
9,s91,s93,s87,sands96.sWhatsissthesmodesscoresofsthesstudentssroundedstosthesnearestswhol
esnumber?s-sans--86
Ifsasstudentsissinsthestopsquintile,sthatsstudentsiss-sans--
Betweensthes80thsands100thspercentile
Researchersswantstosunderstandswhethersasdrugshelpssreducesbloodspressure.sTherefore,s
theyssetsupsans8-
weeksstudyswithssomesparticipantsstakingsthesdrugsandsothersparticipantsstakingsasplacebos
(sugarspill).sThississasformsofs-sans--Experimentalsstudy
Asrandomsnumbersgeneratorsgeneratessasnumbersfroms1stos10.sWhatsissthesprobabilitysthats
thesnumbersgeneratorsgeneratedsas3?s-sans--1/10sors0.1sors10%
Asrandomsnumbersgeneratorsgeneratessasnumbersfroms1stos10.sWhatsissthesprobabilitysthats
thesnumbersgeneratorsgeneratedsasnumberslesssthans3?s-sans--0.2sors20%
Twosrandomsnumbersgeneratorsseachsgeneratesasnumbersfroms1stos10.sWhatsissthesprobab
ilitysthatsbothsnumbersgeneratorssgeneratedsthesnumbers5?s-sans--0.01sors1%
As6-sidedsdiesissrolleds2stimes.sWhatsissthesprobabilitysofsgettings1sbothstimes?s-sans--1/36
Ifstheresissas40%schancesthatsitswillsrainstodaysandsas40%schancesthatsitswillsrainstomorrow,s
whatsissthesprobabilitysthatsitsrainssatsleastsonesofsthesdays?s-sans--64%
Theresares4sapples,s3speachessands2splumssinsasgrocerysbag.sIfsthesthescheckoutspersonspi
ckss2splumbssands1speachsoutsofsthesbag,swhatsissthesprobabilitysthatsthesnextspiecesofsfruits
outsofsthesbagswillsbesansapple?s-sans--2/3sors66.67%
Starburstscandiesscomesinsfourscolors:sred,spink,sorangesandsyellow.sIfstheresares50sStarbur
stssinsasbowlsands20%saresred,s30%saresorange,sands24%saresyellow,showsmanysofsthesStar
burstssarespink?s-sans--13
Sarahsissasmarinesbiologist.sOfsthescoralsshesobservessatsasdivessite,s30%sisshealthy,s40%sis
sunhealthy,sands30%sissdead.sShesestimatessthats30%sofsthesdeadscoralsdiedsinsthespasts12s
months.sWhatspercentagesofsthescoralsthatsshesobservessissdeadscoralsthatsdiedsmoresthans
12smonthssago?s-sans--21%
Ansinvestmentshassas40%schancesofslosings$100,sas40%schancesofsmakings$100,sandsas20
%schancesofsmakings$300.sWhatsissthesexpectedsvaluesofsthesinvestment?s-sans--$60
Insansairlinesfleet,s10saircraftsares30syearssold,s20saircraftsares15syearssold,sands5saircraftsar
es5syearssold.sWhatsissthesaveragesagesofsthesfleet?s-sans--17.9
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