Question12.

WhichofthefollowingExcelfunctions is appliedtotestforsignificance of regression?

1. COVAR
2. ANOVA
3. SINH
4. TREND
5. Noneoftheabove

Question 13.Standardresiduals:

1. helpdetectoutliersthatmaybiastheresultsofaregressionanalysis.
2. causedifferencesintheregressionequationbychangingtheslopeandintercept.
3. pointouttherangesforthepopulationinterceptandslopeata95%confidencelevel.
4. provideinformationfortestinghypothesisassociatedwiththeinterceptandslope.
5. Noneoftheabove

Question14.

A(n) isanextremevaluethatisdifferentfromtherestofthedata.

1. criticalvalue
2. standarderror
3. expectedvalue
4. outlier
5. noneoftheabove

Question15.

Whilecheckingforlinearitybyexaminingtheresidualplot,theresidualsmust:

1. exhibitalineartrend.
2. formaparabolicshape.
3. berandomlyscattered.
4. bebelowthex-axis.
5. Noneoftheabove

Question16.

Whichofthefollowingistruewhentestingfornormalityoferrors?

1. Normalityisverifiedbyinspectingforabell-shapeddistribution.
2. Itiseasiertoevaluatenormalitywithsmallsamplesizes.
3. Ascatterdiagram ofthewholedataisalwaysusedto verifynormality.
4. Errorsarenormallydistributedwhenthescatter diagramshowsa straight-linedistribution.
5. Noneoftheabove

Question17.

Whichofthefollowingistrueaboutmultiplelinearregression?

1. Itisalinearregressionmodelwithmorethanonedependentvariable.
2. Theregressioncoefficientsarecalledfractionalregressioncoefficients.
3. Itusesleastsquarestoestimatetheinterceptandslopecoefficients.
4. TheANOVAtestsforthesignificanceofeachvariableseparately.
5. Noneoftheabove

Question18

Ifthecorrelation coefficient =1.00,then

1. allthedatapointsmustfallexactlyonastraightlinewithaslopethatequals1.00.
2. allthedatapointsmustfallexactlyonastraightlinewithanegativeslope.
3. allthedatapointsmustfallexactlyonastraightlinewithapositiveslope.
4. allthedatapointsmustfallexactlyonahorizontalstraightlinewithazeroslope.
5. Noneoftheabove

Question19.

AssumingalinearrelationshipbetweenXandY,ifthecoefficientofcorrelation=-0.30,

1. thereisnocorrelation.
2. theslope(b₁)isnegative.
3. variableXislargerthanvariableY.
4. thevarianceofXisnegative.
5. Noneoftheabove

Question20.

Testingfortheexistenceofcorrelationisequivalentto

1. testingfortheexistenceof theslope (b₁).
2. testingfortheexistenceoftheY-intercept(b₀).
3. theconfidenceintervalestimateforpredictingY.
4. Noneoftheabove.