STATISTICS FINAL EXAM STUDY GUIDE
QUESTIONS WITH ACTUAL SOLUTIONS
At nnthe nnbeginning nnof nnthe nnschool nnyear, nna nnhigh nnschool nnteacher nnasks nnevery
nnstudent nnin nnher nnclasses nnto nnfill nnout nna nnsurvey nnthat nnasks nnfor nntheir nnage,
nngender, nntheir nnnumber nnof nnyears nnthey nnhave nnlived nnat nntheir nncurrent nnaddress,
nntheir nnfavorite nnschool nnsubject, nnand nnwhether nnthey nnplan nnto nngo nnto nncollege
nnafter nnhigh nnschool. nnWhich nnof nnthe nnfollowing nnbest nndescribes nnthe nntypes nnof
nnvariables nnthat nnare nnbeing nnmeasured?
(a) nnfive nnquantitative nnvariables
(b) nntwo nncategorical nnvariables nnand nntwo nnquantitative nnvariables
(c) nntwo nncategorical nnvariables nnand nnthree nnquantitative nnvariables
(d) nnthree nncategorical nnvariables nnand nntwo nnquantitative nnvariables nn- nnAnswer(d)
nnthree nncategorical nnvariables nnand nntwo nnquantitative nnvariables
The nnoverall nnshape nnof nnthis nndistribution nnis nn
(a) nnskewed nnto nnthe nnright
(b) nnskewed nnto nnthe nnleft
(c) nnroughly nnsymmetric
(d) nnuniform nn- nnAnswer(b) nnskewed nnto nnthe nnleft
The nnmean nnof nnthe nndistribution nn(don't nntry nnto nnfind nnit) nnis nn
(a) nnvery nnclose nnto nnthe nnmedian
(b) nnclearly nnless nnthan nnthe nnmedian
(c) nnclearly nngreater nnthan nnthe nnmedian
(d) nnyou nncan't nnsay nnbecause nnthe nnmean nnis nnrandom nn- nnAnswer(b) nnclearly nnless
nnthan nnthe nnmedian
Based nnon nnthe nnshape nnof nnthis nndistribution, nnwhat nnnumerical nnmeasures nnwould
nnbest nndescribe nnit?
(a) nnThe nnmedian nnand nnthe nnIQR
(b) nnThe nnmean nnand nnstandard nndeviation
(c) nnThe nnmean nnand nnthe nnquartiles
, (d) nnThe nnmedian nnand nnthe nnstandard nndeviation nn- nnAnswer(a) nnThe nnmedian nnand
nnthe nnIQR
The nnpie nnchart nnabove nndescribes nnthe nndistribution nnof nnfavorite nnschool nnsubject
nnfor nn300 nnhigh-school nnstudents. nnThe nnnumber nnof nnstudents nnwhose nnfavorite
nnsubject nnis nnmath nnis:
(a) nn26
(b) nn45
(c) nn60
(d) nn78 nn- nnAnswer(d) nn78
Steve's nnboss nntold nnhim nnthat nnhe nndid nnnot nndeserve nna nnraise nnand nnthat nnSteve
nnwas nnmaking nnan nnamount nnsimilar nnto nnother nnmanagers nnwith nnhis nnexperience.
nnSteve nngathered nnsome nndata nnand nnfound nnthat nnthe nnz-score nnfor nnhis nnsalary
nnas nncomposed nnto nnother nnmanagers nnwith nnthe nnsame nnlevel nnof nnexperience nnis
nn-1.35. nnWhich nnof nnthe nnfollowing nnis nnthe nnbest nninterpretation nnof nnthis nnz-score?
(a) nnSteve nnmakes nn1.35% nnless nnthan nnother nnmanagers nnwith nnhis nnexperience
nnlevel.
(b) nnSteve nnmakes nn$1.35 nnless nnper nnplay nnperiod nnthan nnthe nnaverage nnfor
nnmanagers nnwith nnhis nnexperience nnlevel.
(c) nnSteve nnmakes nn$1.35 nnless nnper nnhour nnthan nnthe nnaverage nnfor nnmanagers
nnwith nnhis nnexperience nnlevel.
(d) nnSteve's nnsalary nnis nn1.35 nnstandard nndeviation nnbelow nnthe nnmean nnsalary nnof
nnall nnmanagers nnwith nnhis nnexperience nnlevel. nn- nnAnswer(d) nnSteve's nnsalary nnis
nn1.35 nnstandard nndeviation nnbelow nnthe nnmean nnsalary nnof nnall nnmanagers nnwith
nnhis nnexperience nnlevel.
Which nnof nnthe nnfollowing nnare nnresistant nnto nnoutliers?
(a) nnThe nnmean nnand nnstandard nndeviation
(b) nnThe nnmedian nnand nnstandard nndeviation
(c) nnThe nnmedian nnand nnthe nnIQR
(d) nnThe nnrange nnand nnthe nnIQR nn- nnAnswer(c) nnThe nnmedian nnand nnthe nnIQR
Which nnof nnthe nndistributions nnbelow nnhas nnthe nnlarger nnstandard nndeviation?
(a) nnDistribution nnA
(b) nnDistribution nnB
(c) nnThe nnstandard nndeviations nnare nnequal nnsince nnthe nnranges nnare nnequal
(d) nnThe nnstandard nndeviations nnare nnequal nnsince nnboth nndistributions nnare
nnsymmetric. nn- nnAnswer(a) nnDistribution nnA
The nnfive-number nnsummary nnof nnthe nndistribution nnof nnscores nnon nnthe nnfinal nnexam
nnin nnPsych nn001 nnlast nnsemester nnwas nnmin=18 nnQ1=39 nnMed=62 nnQ3=76
QUESTIONS WITH ACTUAL SOLUTIONS
At nnthe nnbeginning nnof nnthe nnschool nnyear, nna nnhigh nnschool nnteacher nnasks nnevery
nnstudent nnin nnher nnclasses nnto nnfill nnout nna nnsurvey nnthat nnasks nnfor nntheir nnage,
nngender, nntheir nnnumber nnof nnyears nnthey nnhave nnlived nnat nntheir nncurrent nnaddress,
nntheir nnfavorite nnschool nnsubject, nnand nnwhether nnthey nnplan nnto nngo nnto nncollege
nnafter nnhigh nnschool. nnWhich nnof nnthe nnfollowing nnbest nndescribes nnthe nntypes nnof
nnvariables nnthat nnare nnbeing nnmeasured?
(a) nnfive nnquantitative nnvariables
(b) nntwo nncategorical nnvariables nnand nntwo nnquantitative nnvariables
(c) nntwo nncategorical nnvariables nnand nnthree nnquantitative nnvariables
(d) nnthree nncategorical nnvariables nnand nntwo nnquantitative nnvariables nn- nnAnswer(d)
nnthree nncategorical nnvariables nnand nntwo nnquantitative nnvariables
The nnoverall nnshape nnof nnthis nndistribution nnis nn
(a) nnskewed nnto nnthe nnright
(b) nnskewed nnto nnthe nnleft
(c) nnroughly nnsymmetric
(d) nnuniform nn- nnAnswer(b) nnskewed nnto nnthe nnleft
The nnmean nnof nnthe nndistribution nn(don't nntry nnto nnfind nnit) nnis nn
(a) nnvery nnclose nnto nnthe nnmedian
(b) nnclearly nnless nnthan nnthe nnmedian
(c) nnclearly nngreater nnthan nnthe nnmedian
(d) nnyou nncan't nnsay nnbecause nnthe nnmean nnis nnrandom nn- nnAnswer(b) nnclearly nnless
nnthan nnthe nnmedian
Based nnon nnthe nnshape nnof nnthis nndistribution, nnwhat nnnumerical nnmeasures nnwould
nnbest nndescribe nnit?
(a) nnThe nnmedian nnand nnthe nnIQR
(b) nnThe nnmean nnand nnstandard nndeviation
(c) nnThe nnmean nnand nnthe nnquartiles
, (d) nnThe nnmedian nnand nnthe nnstandard nndeviation nn- nnAnswer(a) nnThe nnmedian nnand
nnthe nnIQR
The nnpie nnchart nnabove nndescribes nnthe nndistribution nnof nnfavorite nnschool nnsubject
nnfor nn300 nnhigh-school nnstudents. nnThe nnnumber nnof nnstudents nnwhose nnfavorite
nnsubject nnis nnmath nnis:
(a) nn26
(b) nn45
(c) nn60
(d) nn78 nn- nnAnswer(d) nn78
Steve's nnboss nntold nnhim nnthat nnhe nndid nnnot nndeserve nna nnraise nnand nnthat nnSteve
nnwas nnmaking nnan nnamount nnsimilar nnto nnother nnmanagers nnwith nnhis nnexperience.
nnSteve nngathered nnsome nndata nnand nnfound nnthat nnthe nnz-score nnfor nnhis nnsalary
nnas nncomposed nnto nnother nnmanagers nnwith nnthe nnsame nnlevel nnof nnexperience nnis
nn-1.35. nnWhich nnof nnthe nnfollowing nnis nnthe nnbest nninterpretation nnof nnthis nnz-score?
(a) nnSteve nnmakes nn1.35% nnless nnthan nnother nnmanagers nnwith nnhis nnexperience
nnlevel.
(b) nnSteve nnmakes nn$1.35 nnless nnper nnplay nnperiod nnthan nnthe nnaverage nnfor
nnmanagers nnwith nnhis nnexperience nnlevel.
(c) nnSteve nnmakes nn$1.35 nnless nnper nnhour nnthan nnthe nnaverage nnfor nnmanagers
nnwith nnhis nnexperience nnlevel.
(d) nnSteve's nnsalary nnis nn1.35 nnstandard nndeviation nnbelow nnthe nnmean nnsalary nnof
nnall nnmanagers nnwith nnhis nnexperience nnlevel. nn- nnAnswer(d) nnSteve's nnsalary nnis
nn1.35 nnstandard nndeviation nnbelow nnthe nnmean nnsalary nnof nnall nnmanagers nnwith
nnhis nnexperience nnlevel.
Which nnof nnthe nnfollowing nnare nnresistant nnto nnoutliers?
(a) nnThe nnmean nnand nnstandard nndeviation
(b) nnThe nnmedian nnand nnstandard nndeviation
(c) nnThe nnmedian nnand nnthe nnIQR
(d) nnThe nnrange nnand nnthe nnIQR nn- nnAnswer(c) nnThe nnmedian nnand nnthe nnIQR
Which nnof nnthe nndistributions nnbelow nnhas nnthe nnlarger nnstandard nndeviation?
(a) nnDistribution nnA
(b) nnDistribution nnB
(c) nnThe nnstandard nndeviations nnare nnequal nnsince nnthe nnranges nnare nnequal
(d) nnThe nnstandard nndeviations nnare nnequal nnsince nnboth nndistributions nnare
nnsymmetric. nn- nnAnswer(a) nnDistribution nnA
The nnfive-number nnsummary nnof nnthe nndistribution nnof nnscores nnon nnthe nnfinal nnexam
nnin nnPsych nn001 nnlast nnsemester nnwas nnmin=18 nnQ1=39 nnMed=62 nnQ3=76
