lOMoAR cPSD| 9970737
WGU C784 Objective Assessment (Latest 2024/
2025 Update) Applied Healthcare Statistics | Qs
and As| 100% Correct| Grade A (Verified
Answers)
llQuestion
Alfairlcoinlislflipped.lWhatlislthellikelihoodloflthelcoinllandinglonlheadsliflitlis
lflippedlagain?
a. 0.25
b. 0.17
c. 0.5
d. 0.2
Answer
0.5
Brieflexplanation
Therelislonel“heads”landltwolsidesltolalcoin,lsolP(heads)l=l½l=l0.5.lP
reviouslflipsldon’tlmatter.
Pageslforladditionallpractice
Modulel7:l7.04-lProbabilitylandlRelativelFrequency
Question
Researcherslsurveyedl100lpatientslonltheirlpreferredlprocedure.lTheirl
preferenceslincludelthelfollowing:
35l-lInfusions
30l-lIncision/drainage
25l-lWoundlcare
10l-lVitallsigns
Whatlislthelrelativelfrequencylforlpatientslchoosinglwoundlcarelasltheirlp
referredlprocedure?
a.l 0.10
b.l 0.25l
c.l 0.30
, d.l 0.35
Answer
0.25
Brieflexplanation
25lpatientsllistedlWoundlcarelasltheirlpreferredlprocedure.l100lpatients
totallwerelsurveyed:l25/100l=l0.25
Video
BasiclProbabilitylandlthelCountinglPrinciplel[4:31]
Pageslforladditionallpractice
Modulel7:l7.04-lProbabilitylandlRelativelFrequency
llllQuestion
Alstreetlperformerlislplanningltolfliplalcoinlthreeltimes.lThelprobabilitylthel
coinllandslheadsluplorltailsluplislequallyllikely.lWhatlislthelprobabilitylof
thelcoinllandinglheadsluplexactlyltwoltimes?
a. 0.250
b. 0.875
c. 0.500
d. 0.375
Answer
0.375
Brieflexplanation
Usingltheltreelmethod,lthelsamplelspacelisl{HHH,lHHT,lHTH,lHTT,lTHH,l
THT,lTTH,lTTT}.llThreeloflthellistedloutcomeslhavelexactlyltwolheads:
{HHT,lHTH,lTHH}.llTherelareleightloutcomesltotal,lwhencelP(exactlyltwo
heads)l=l⅜l=l0.375.
Video
DrawinglProbabilitylTreesl[8:01]
Pageslforladditionallpractice
Modulel7:l7.05-lSamplelSpacelandl7.05.1-lSamplelSpaceslandlProbability
Question
, Alboxlcontainslonelredlball,lonelpurplelball,landlonelbluelball.lTwolballslar
eldrawnlatlrandomlfromlthelboxlonelafterlthelotherlwithoutlreplacinglthelfir
stlball.lWhatlislthelprobabilitylofldrawinglalredlballlsecond?
a. 0.83
b. 0.50
c. 0.67
d. 0.33
Answer
0.33
Brieflexplanation
Usingltheltreelmethod,lthelsamplelspacelisl{RB,lRP,lBR,lBP,lPR,lPB}.l
Twoloflthellistedloutcomeslhavelredlsecond:l{BR,lPR}.llTherelarelsix
outcomesltotal,lwhencelP(redlsecond)l=l2/6l=l0.33.
Video
DrawinglProbabilitylTreesl[8:01]
Pageslforladditionallpractice
Modulel7:l7.05-lSamplelSpacelandl7.05.1-lSamplelSpaceslandlProbability
Question
Threelwomenlarelpregnantlwithlonelchildleach.lWhatlarelthelpossible
outcomeslforlthelbabies’lsex,lassignedlasleitherlmalel(M)lorlfemalel(F)?
a.ll MMM,lMMF,lFFM,lFFF
b.ll MMM,lMMF,lMFM,lMFF,lFMM,lFMF,lFFM,lFFF
c.lllMMM,lMMF,lMFM,lMFF,lFMM,lFFM,lFFF,lFMM
d.ll MMM,lMFM,lFMF,lFFF
Answer
MMM,lMMF,lMFM,lMFF,lFMM,lFMF,lFFM,lFFF
Brieflexplanation
Useltheltreelmethodltolcreateltheldesiredlsamplelspace.
Video
DrawinglProbabilitylTreesl[8:01]
Pageslforladditionallpractice
Modulel7:l7.05lSamplelSpace
lQuestion
, Alphysicianlislreviewinglclinicallresultslandlfindslthatlthelpatientlhasl
anlelevatedltemperaturelandlalhighlcholesterollvale.lOnlaverage,lpa
tients
presentlwithlanlelevatedltemperaturel20%lofltheltime,llalhighlcholesteroll72
%
ofltheltime,landlthelprobabilityloflbothlisl14.4%.lWhatlisltruelaboutlthe
selresults?
a.ll Thelvalueslareldisjoint
b.ll Thelvalueslareldependent
c.lllThelvalueslarelindepend
entld.ll Thelvalueslarelrelate
d
Answer
Independent
Brieflexplanation
Checkltolseelif:
P(elevatedltemplandlhighlcholesterol)l=lP(elevatedltemp)×P(highlcholester
ol)lSincel0.144ldoeslequall0.20×0.72,ltheltwoleventslarelindependent.
Videos
Testslforlindependencel[13:24]landllDeterminingldisjointnesslan
dlindependencel[6:13]
Pageslforladditionallpractice
Modulel7:l7.11.2-lDetermininglIndependencelfromlProbabilities
llQuestion
Studieslshowlthatlpeoplelthatllivelinlverylcoldlclimateslhavelal30%lchanc
eloflgettinglinfluenzalandlal15%lchanceloflgettinglappendicitislduringlthe
winter.lWhatlislthelprobabilitylalpersonlhaslbothldiagnoses,lroundedltolthe
nearestlpercent?
a. 5%
b. 45%
c. 15%
d. 30%
Answer
5%
Brieflexplanation
“Both”lislanl“and”lword.l“And”ltellslusltolmultiply.lBothlinfluenzaland
