STAT 301 Exam 1
Questions and Answers
Updated 2026
VariablesB-
BAnswerBareBitemsB(usuallyBrepresentedBbyBlettersBorBsymbols)BofBinterestBwhichBcan
BtakeBonBdifferentBvalues.
PopulationB-BAnswerB-isBtheBentireBoverallBgroupBweBareBinterestedBin.
-canBbeBlargeBorBsmall
SampleB-BAnswerBisBaBsubsetBofBtheBentireBpopulationBthatBweBcollectBdataBon.B
TheBvariable(s)BofBinterestBis/areBmeasuredBonBeachBmemberBofBthe
DescriptiveBstatisiticsB-BAnswerB-
BinvolveBdescribingBaBdataset:BweBcouldBmakeBaBgraphBofBit,BorBtellByouBitsBaverage
BandBhowBspreadBoutBitBis.BWeBcouldBtellByouBanyBinterestingBfeaturesBaboutBit.B
-WeBdoBnotBgeneralizeBfactsBaboutBtheBdatasetBtoBaBlargerBgroup.
statisticalBinferenceB-
BAnswerBTheBprocessBofBusingBdataBobtainedBfromBaBsampleBtoBmakeBestimatesBorB
testBhypothesesBaboutBtheBcharacteristicsBofBaBpopulation.
ParameterB-BAnswerBaBnumericBcharacteristicBpertainingBtoBaBpopulation.
StatisticB-
BAnswerBisBanyBnumberByouBcalculateBusingBdata.BWeBoftenBuseBstatisticsBtoBestimat
eBparameters.
, PredictorBVariableB-
BAnswerBSometimesBcalledBtheB"independentBvariable",BorBtheB"explanatoryBvariable".
BTheseBareBvariablesBwhichBweBthinkBwillBbeBusefulBinBpredictingBorBinBexplainingBth
eBresponseBvariable.BThereBmayBbeBmoreBthan
ResponseBVariableB-
BAnswerBSometimesBcalledBtheB"dependentBvariable".BThisBisBtheBvariableBwhoseBbeh
aviorBweBwantBtoBexplain,BorBwhoseBvalueBweBwantBtoBpredict.
quantitiveBvariableB-
BAnswerBNumericBvariables,Be.g.Bheight,Bweight,BnumberBofBcustomers,BbloodBalcohol
Blevel.
categoricalBvariableB-
BAnswerBNamesBorBcategories,Be.g.BeyeBcolor,BtypeBofBcar,BpoliticalBaffiliation,BbreedB
ofBdog.
quantitiveBcontinuousB-
BAnswerB●NumericBvariablesBwhichBcanBbeBreportedBtoBanBarbitraryBnumberBofBdeci
malBplaces.B
●Typically,BareBmeasuredBwithBsomeBkindBofBdevice,BsuchBasBaBthermometerBorBaBru
ler.
QuantitiveBdiscreteB-
BAnswerB●NumericBvariablesBwhereBonlyBintegerBresponsesBmakeBsense.BTypically,Bar
eBcounted.
●Examples:B#BofBpetsBinBaBhousehold,BfinishingBplaceBofBaBrunnerBinBaBrace...
categoricalBOrdinalBvariablesB-
BAnswerBareBtypicallyBplacedBinBaBsetBorder.BIfBplacingBtheBvaluesB"outBofBorder"Bw
ouldBbeBconfusing,BthenBitBshouldBprobablyBbeBtreatedBas___
Questions and Answers
Updated 2026
VariablesB-
BAnswerBareBitemsB(usuallyBrepresentedBbyBlettersBorBsymbols)BofBinterestBwhichBcan
BtakeBonBdifferentBvalues.
PopulationB-BAnswerB-isBtheBentireBoverallBgroupBweBareBinterestedBin.
-canBbeBlargeBorBsmall
SampleB-BAnswerBisBaBsubsetBofBtheBentireBpopulationBthatBweBcollectBdataBon.B
TheBvariable(s)BofBinterestBis/areBmeasuredBonBeachBmemberBofBthe
DescriptiveBstatisiticsB-BAnswerB-
BinvolveBdescribingBaBdataset:BweBcouldBmakeBaBgraphBofBit,BorBtellByouBitsBaverage
BandBhowBspreadBoutBitBis.BWeBcouldBtellByouBanyBinterestingBfeaturesBaboutBit.B
-WeBdoBnotBgeneralizeBfactsBaboutBtheBdatasetBtoBaBlargerBgroup.
statisticalBinferenceB-
BAnswerBTheBprocessBofBusingBdataBobtainedBfromBaBsampleBtoBmakeBestimatesBorB
testBhypothesesBaboutBtheBcharacteristicsBofBaBpopulation.
ParameterB-BAnswerBaBnumericBcharacteristicBpertainingBtoBaBpopulation.
StatisticB-
BAnswerBisBanyBnumberByouBcalculateBusingBdata.BWeBoftenBuseBstatisticsBtoBestimat
eBparameters.
, PredictorBVariableB-
BAnswerBSometimesBcalledBtheB"independentBvariable",BorBtheB"explanatoryBvariable".
BTheseBareBvariablesBwhichBweBthinkBwillBbeBusefulBinBpredictingBorBinBexplainingBth
eBresponseBvariable.BThereBmayBbeBmoreBthan
ResponseBVariableB-
BAnswerBSometimesBcalledBtheB"dependentBvariable".BThisBisBtheBvariableBwhoseBbeh
aviorBweBwantBtoBexplain,BorBwhoseBvalueBweBwantBtoBpredict.
quantitiveBvariableB-
BAnswerBNumericBvariables,Be.g.Bheight,Bweight,BnumberBofBcustomers,BbloodBalcohol
Blevel.
categoricalBvariableB-
BAnswerBNamesBorBcategories,Be.g.BeyeBcolor,BtypeBofBcar,BpoliticalBaffiliation,BbreedB
ofBdog.
quantitiveBcontinuousB-
BAnswerB●NumericBvariablesBwhichBcanBbeBreportedBtoBanBarbitraryBnumberBofBdeci
malBplaces.B
●Typically,BareBmeasuredBwithBsomeBkindBofBdevice,BsuchBasBaBthermometerBorBaBru
ler.
QuantitiveBdiscreteB-
BAnswerB●NumericBvariablesBwhereBonlyBintegerBresponsesBmakeBsense.BTypically,Bar
eBcounted.
●Examples:B#BofBpetsBinBaBhousehold,BfinishingBplaceBofBaBrunnerBinBaBrace...
categoricalBOrdinalBvariablesB-
BAnswerBareBtypicallyBplacedBinBaBsetBorder.BIfBplacingBtheBvaluesB"outBofBorder"Bw
ouldBbeBconfusing,BthenBitBshouldBprobablyBbeBtreatedBas___
