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WPC300 Quiz 5 Regression with correct Answers
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WPC300 Quiz 5 Regression with correct Answers
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WPC300 Quiz 5 Regression with correctAnswers
A iimarket iianalyst iiis iideveloping iia iiregression iimodel iito iipredict iimonthly iihousehold
iiexpenditures iion iigroceries iias iia iifunction iiof iifamily iisize, iihousehold iiincome, iiand
iihousehold iineighborhood ii(urban, iisuburban, iiand iirural). iiThe ii"neighborhood" iivariable
iiin iithis iimodel iiis ii________. ii- iiAnswers ii-an iiindependent iivariable
Which iiof iithe iifollowing iiassumptions iiis iinot iitrue iifor iimultiple iilinear iiregression? ii-
iiAnswers ii-There iiwill iibe iia iimulti-collinearity iieffect.
A iimanager iiwishes iito iipredict iithe iiannual iicost ii(y) iiof iian iiautomobile iibased iion iithe
iinumber iiof iimiles ii(x) iidriven. iiThe iifollowing iimodel iiwas iideveloped: iiy ii= ii$1500 ii+
ii0.36x. iiIf iia iicar iiis iidriven ii15000 iimiles iiin iia iiyear, iithe iimodel iipredicts iithe iiannual
iicost iiof iithe iicar iito iibe: ii- iiAnswers ii-$6900
What iiwould iibe iithe iinull iihypothesis iifor iitesting iia iilinear iiregression iimodel iiwith iiprofit
iias iithe iidependent iivariable iiand iisales iias iithe iiindependent iivariable? ii- iiAnswers ii-
There iiis iino iilinear iirelationship iibetween iiprofit iiand iisales.
The iivalue iiof iiR-Squared iialways iifalls iibetween ii________ iiand ii________, iiinclusive. ii-
iiAnswers ii-0 iiand ii1
The iicorrelation iicoefficient iibetween iithe iiage iiof iia iivehicle iiand iithe iimoney iispent iito
iirepair iiit iiis ii0.9. iiWhich iiof iithe iifollowing iistatement iiis iitrue? ii- iiAnswers ii-81% iiof iithe
iivariation iiin iithe iimoney iispent iion iirepairs iiis iiexplained iiby iithe iiage iiof iithe iivehicle
Which iiof iithe iifollowing iistatement iiis iitrue iibased iion iithe iifollowing iiregression
iiequation?IQ ii= ii4.0 ii+ iiReading iiLabel ii* ii5.6 ii- iiAnswers ii-A iiunit iipoint iichange iiin
iireading iilabel iiwill iiincrease iiIQ iiby ii5.6 iipoint.
A iicorrelation iicoefficient iibetween ii"college iientrance iiexam" iigrades iiand iischolastic
iiachievement iiwas iifound iito iibe ii-1.08. iiOn iithe iibasis iiof iithis, iiyou iiwould iitell iithe
iiuniversity iithat: ii- iiAnswers ii-They iishould iihire iia iinew iistatistician.
The iiunexplained iivariance iiin iithe iiregression iianalysis iiis iialso iiknown iias: ii- iiAnswers ii-
Residual iivariance
Which iiof iithe iifollowing iiis iitrue iiabout iimulti-collinearity? ii- iiAnswers ii-It iiis iimeasured
iiusing iia iimeasure iicalled iivariance iiinflation iifactor ii(VIF).
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