WGU C784-Statistics Mod 4 Flashcards
Exam Questions With Correct Answers 2024-
2025
DefinehModeh-hCorrecthAnswers-Thehvaluehthathoccurshmosthoftenhinhahdatahset
ThehMeanhofhahdatahsethrepresentshthe?h-hCorrecthAnswers-Average
Medianhofhahdatahseth-hCorrecthAnswers-Thehmiddlehvaluehofhthehdatahset
Whatharehthehtwohtypeshofhvariablesh-hCorrecthAnswers-
1)hQuantitativehVariableh2)hCategoricalhVariable
Quantitativehvariableh-hCorrecthAnswers-Quantitativehvariableh-
hahvariablehthathtakeshahnumericalhvaluehthathcanhbehcountedhorhmeasured.
Examples:hheight,hweight,hage,hcholesterolhlevel,hexamhscores
Categoricalhvariableh-hCorrecthAnswers-Categoricalhvariableh-
hahvariablehthathishnothmeasured;hithishah"category"horhahlabel;hithplaceshthehindividualhinhahcertainhg
roup.
Examples:hgender,hmonthshofhthehyear,hziphcodes
ListhTwohGraphicalhDisplayshforhCategoricalhDatah-hCorrecthAnswers-1)hPiehChartsh2)hBarhCharts
___________________h-hbesthwhenhwehwanthtohdisplayhdifferenthpartshofhahwholeh-
hCorrecthAnswers-PiehCharts.
, _______________________h-hbesthtohdisplayhcountshorhfrequencieshforhthehcategoriesh-
hCorrecthAnswers-BarhCharts.
Lisththeh4hdifferenthGraphicalhDisplayshforhQuantitativehDatah-hCorrecthAnswers-DothPloth-
hBesthtohdisplayhthehdistributionhofhdata,hparticularlyhclusters,hgaps,handhoutliers.hMosthusefulhforhsm
allerhdatahsets.
StemhPloth(orhStemhandhLeafhPlot)h-
hBesthtohdisplayhthehdistributionhorhshapehofhdatahaccordinghtohplacehvalues.hKeepshinformationhabo
uthindividualhdatahpoints.
BoxhPloth-hBesthtohdisplayhthehcenter,hspread,handhoutliershofhahgivenhdatahset.
Histogramh-
hBesthtohdisplayhthehdistributionh(shapehandhspread)hofhquantitativehdata.hWorkshwellhwithhlargehdat
ahsets.
Ahstemhplothishconstructedhbyhseparatingheachhdatahvaluehintohahstemhandhahleaf.hThehleafhishtheh__
________hmosthdigit,handhthehstemhconsistshofhallhofhthehdigitshtohtheh__________hofhthehleaf.h-
hCorrecthAnswers-
Ahstemhplothishconstructedhbyhseparatingheachhdatahvaluehintohahstemhandhahleaf.hThehleafhishthehrig
hthmosthdigit,handhthehstemhconsistshofhallhofhthehdigitshtohthehlefthofhthehleaf.
Note:hRepresentheachhnumberhthathishinhthehoneshplacehfromhthehlisthofhnumbers.hByhdoinghthishthe
hstemshwillhconsisthofhones,htwos,hthrees,handhfours.hNexthlisththehleafshbyhtakinghthehdigithtohthehrig
hthandhwritinghithwithinhthehcoloumn/
stemhthathmatcheshthehoneshplacehholderhofhthehnumber.hExampleh31hthehoneshplace/
hstemhish"3"hthehLeafhwhichhishtohthehrighthofhthehnumberhish"1".
Afterhlistinghallhstemshandhleafs.hRe-arrangehthemhinhincreasinghorder.
Ifhthehlisthofhnumbershishlonghorhbighyouhcanhspliththehstemhandhleafhintohtwohsets.hEx.hthehfirsthste
mhsethofh1hwillhlisthanyhleafsh1-5hwhilehthehsecondhstemhleafhsethcanhlisthanyhleafsh6-
9.hSeehthirshgraphhforhillustration
Exam Questions With Correct Answers 2024-
2025
DefinehModeh-hCorrecthAnswers-Thehvaluehthathoccurshmosthoftenhinhahdatahset
ThehMeanhofhahdatahsethrepresentshthe?h-hCorrecthAnswers-Average
Medianhofhahdatahseth-hCorrecthAnswers-Thehmiddlehvaluehofhthehdatahset
Whatharehthehtwohtypeshofhvariablesh-hCorrecthAnswers-
1)hQuantitativehVariableh2)hCategoricalhVariable
Quantitativehvariableh-hCorrecthAnswers-Quantitativehvariableh-
hahvariablehthathtakeshahnumericalhvaluehthathcanhbehcountedhorhmeasured.
Examples:hheight,hweight,hage,hcholesterolhlevel,hexamhscores
Categoricalhvariableh-hCorrecthAnswers-Categoricalhvariableh-
hahvariablehthathishnothmeasured;hithishah"category"horhahlabel;hithplaceshthehindividualhinhahcertainhg
roup.
Examples:hgender,hmonthshofhthehyear,hziphcodes
ListhTwohGraphicalhDisplayshforhCategoricalhDatah-hCorrecthAnswers-1)hPiehChartsh2)hBarhCharts
___________________h-hbesthwhenhwehwanthtohdisplayhdifferenthpartshofhahwholeh-
hCorrecthAnswers-PiehCharts.
, _______________________h-hbesthtohdisplayhcountshorhfrequencieshforhthehcategoriesh-
hCorrecthAnswers-BarhCharts.
Lisththeh4hdifferenthGraphicalhDisplayshforhQuantitativehDatah-hCorrecthAnswers-DothPloth-
hBesthtohdisplayhthehdistributionhofhdata,hparticularlyhclusters,hgaps,handhoutliers.hMosthusefulhforhsm
allerhdatahsets.
StemhPloth(orhStemhandhLeafhPlot)h-
hBesthtohdisplayhthehdistributionhorhshapehofhdatahaccordinghtohplacehvalues.hKeepshinformationhabo
uthindividualhdatahpoints.
BoxhPloth-hBesthtohdisplayhthehcenter,hspread,handhoutliershofhahgivenhdatahset.
Histogramh-
hBesthtohdisplayhthehdistributionh(shapehandhspread)hofhquantitativehdata.hWorkshwellhwithhlargehdat
ahsets.
Ahstemhplothishconstructedhbyhseparatingheachhdatahvaluehintohahstemhandhahleaf.hThehleafhishtheh__
________hmosthdigit,handhthehstemhconsistshofhallhofhthehdigitshtohtheh__________hofhthehleaf.h-
hCorrecthAnswers-
Ahstemhplothishconstructedhbyhseparatingheachhdatahvaluehintohahstemhandhahleaf.hThehleafhishthehrig
hthmosthdigit,handhthehstemhconsistshofhallhofhthehdigitshtohthehlefthofhthehleaf.
Note:hRepresentheachhnumberhthathishinhthehoneshplacehfromhthehlisthofhnumbers.hByhdoinghthishthe
hstemshwillhconsisthofhones,htwos,hthrees,handhfours.hNexthlisththehleafshbyhtakinghthehdigithtohthehrig
hthandhwritinghithwithinhthehcoloumn/
stemhthathmatcheshthehoneshplacehholderhofhthehnumber.hExampleh31hthehoneshplace/
hstemhish"3"hthehLeafhwhichhishtohthehrighthofhthehnumberhish"1".
Afterhlistinghallhstemshandhleafs.hRe-arrangehthemhinhincreasinghorder.
Ifhthehlisthofhnumbershishlonghorhbighyouhcanhspliththehstemhandhleafhintohtwohsets.hEx.hthehfirsthste
mhsethofh1hwillhlisthanyhleafsh1-5hwhilehthehsecondhstemhleafhsethcanhlisthanyhleafsh6-
9.hSeehthirshgraphhforhillustration
