MODULE 6 REVIEW TEST- STATISTICS QUIZZES AND
RIGHT ANSWERS 2025 - 2026
Based,on,the,results,shown,,what,do,you,think,the,relationship,is,between,age,and,depression?
a),It,is,positively,correlated
b),It,is,negatively,correlated
c),No,correlation
d),Can't,tell,from,this,display,,ANS,-
The,correct,answer,is,d.,We,can,not,determine,the,relationship,between,age,and,depression,as,we,don't,k
now,how,the,data,pair,up.,The,other,question,answer,choices,cannot,be,determined,because,to,assess,co
rrelation,we,need,to,be,able,to,see,how,the,data,is,paired.
A,car,company,wanted,to,study,the,relationship,between,the,weight,of,the,car,and,the,car's,average,gas,
mileage,,so,they,collected,data,from,several,of,their,cars,and,wrote,down,their,weights,and,average,gas,m
ileage,and,plotted,this,data,on,the,scatterplot,below.,The,least,squares,regression,line,for,the,data,is,y=−0
.0084x+48.8,,,where,x,is,the,weight,of,the,car,in,pounds,and,y,is,the,average,gas,mileage,(in,miles,per,gallo
n).,What,is,the,predicted,gas,mileage,for,a,car,that,weighs,2500,pounds?
a),29.18,miles,per,gallon
b),26.4,miles,per,gallon
c),27.8,miles,per,gallon
d),69.8,miles,per,gallon,,ANS,-
The,correct,answer,is,c.,To,find,the,predicted,gas,mileage,for,a,car,that,weighs,2500,pounds,,substitute,x=
2500,into,the,regression,equation,and,solve,for,y,.,y=−0.0084(2500)+48.8,,,so,y=27.8,.
Which,of,the,following,can,help,prevent,Simpson's,Paradox,from,occurring?
a),Having,the,greatest,number,of,subjects,in,the,lowest,performing,trial.
b),Having,an,equal,number,of,subjects,exposed,to,each,of,the,treatments,in,each,trial.
c),Having,the,greatest,number,of,subjects,in,the,highest,performing,trial.
,d),Having,each,subject,be,exposed,to,each,treatment,in,the,trial.,,ANS,-
The,correct,answer,is,b.,Simpson's,paradox,is,avoided,by,having,an,equal,number,of,subjects,exposed,to,e
ach,of,the,treatments,in,each,trial.
Due,to,budget,cuts,,a,scientist,had,her,funding,reduced,for,a,research,project.,Her,support,only,enabled,h
er,to,collect,2,data,points,,(2,3.26),and,(4,6.52),.,The,data,points,are,plotted,below.,What,is,your,estimate,
of,the,correlation,coefficient?
a),−1,
b),Zero
c),1,
d),Cannot,be,determined,,ANS,-
The,correct,answer,is,c.,The,correlation,indicated,by,these,two,data,points,would,be,+1,,,though,no,conclu
sions,should,be,drawn,as,more,data,would,need,to,be,collected.
To,better,understand,the,metabolics,of,weight,gain,,appetite,,and,exercise,researchers,looked,at,the,relat
ionship,between,Fat-
Free,Mass,and,Total,Daily,Energy,Intake.,The,scatter,plot,shows,one,result,of,their,research.,What,trend,d
o,you,see?
a),As,FFM,increases,,EI,tends,to,increase.
b),There,is,no,linear,relationship
c),As,Energy,Intake,goes,up,,it,increases,Fat-Free,Mass
d),All,of,the,above,,ANS,-This,scatterplot,indicates,a,positive,correlation.
The,b,in,y=mx+b,is,what?
a),The,point,at,which,the,least,squares,line,crosses,the,y-axis
b),The,value,of,y,when,x=0.
c),Neither,A,nor,B
d),Both,A,and,B,,ANS,-The,b,in,y=mx+b,is,the,point,at,which,the,least,squares,line,crosses,the,y,-
axis,and,the,value,of,y,when,x=0,.
, A,middle,school,principal,wants,to,compare,the,effectiveness,of,two,different,methods,for,teaching,spelli
ng.,She,selects,two,teams,of,students,with,similar,academic,abilities.,Four,teaching,sessions,are,held.,Afte
r,each,session,,the,two,teams,compete,in,a,spelling,match.,
Spelling,Match,Scores,by,Team:,
Which,conclusion,can,be,made?
a),Team,A,performed,better.
b),Team,B,performed,better.
c),There,is,not,a,significant,difference,in,performance,between,the,teams.
d),There,is,a,significant,difference,in,performance,between,the,teams.,,ANS,-
The,correct,answer,is,c.,The,winning,team,alternates,for,each,match,and,the,difference,in,scores,is,roughl
y,the,same,for,matches,1,and,4,,and,for,matches,2,and,3.,Therefore,,we,cannot,say,that,one,team,outperf
ormed,the,other.
Please,select,the,correct,definition,for,least,squares.
a),A,method,that,minimizes,the,squared,distances,of,data,points,from,a,line,that,captures,the,trend,in,pair
ed,data.
b),The,criteria,by,which,the,best-fit,line,is,selected,for,paired,data
c),Both,A,&,B
d),None,of,the,above,,ANS,-The,correct,answer,is,c.,Least,squares,is,the,criteria,by,which,the,best-
fit,line,is,selected,for,paired,data.,It,is,a,method,that,minimizes,the,squared,distances,of,data,points,from,
a,line,that,captures,the,trend,in,paired,data.
How,will,the,removal,of,the,outlier,in,the,following,graph,affect,the,relationship,between,x,and,y,?,
a),It,will,weaken,the,negative,relationship.
b),It,will,strengthen,the,positive,relationship.
c),It,will,strengthen,the,negative,relationship.
d),It,will,weaken,the,positive,relationship.,,ANS,-
he,correct,answer,is,c.,The,dots,move,down,from,left,to,right,(negative,relationship).,Removing,the,outlier
RIGHT ANSWERS 2025 - 2026
Based,on,the,results,shown,,what,do,you,think,the,relationship,is,between,age,and,depression?
a),It,is,positively,correlated
b),It,is,negatively,correlated
c),No,correlation
d),Can't,tell,from,this,display,,ANS,-
The,correct,answer,is,d.,We,can,not,determine,the,relationship,between,age,and,depression,as,we,don't,k
now,how,the,data,pair,up.,The,other,question,answer,choices,cannot,be,determined,because,to,assess,co
rrelation,we,need,to,be,able,to,see,how,the,data,is,paired.
A,car,company,wanted,to,study,the,relationship,between,the,weight,of,the,car,and,the,car's,average,gas,
mileage,,so,they,collected,data,from,several,of,their,cars,and,wrote,down,their,weights,and,average,gas,m
ileage,and,plotted,this,data,on,the,scatterplot,below.,The,least,squares,regression,line,for,the,data,is,y=−0
.0084x+48.8,,,where,x,is,the,weight,of,the,car,in,pounds,and,y,is,the,average,gas,mileage,(in,miles,per,gallo
n).,What,is,the,predicted,gas,mileage,for,a,car,that,weighs,2500,pounds?
a),29.18,miles,per,gallon
b),26.4,miles,per,gallon
c),27.8,miles,per,gallon
d),69.8,miles,per,gallon,,ANS,-
The,correct,answer,is,c.,To,find,the,predicted,gas,mileage,for,a,car,that,weighs,2500,pounds,,substitute,x=
2500,into,the,regression,equation,and,solve,for,y,.,y=−0.0084(2500)+48.8,,,so,y=27.8,.
Which,of,the,following,can,help,prevent,Simpson's,Paradox,from,occurring?
a),Having,the,greatest,number,of,subjects,in,the,lowest,performing,trial.
b),Having,an,equal,number,of,subjects,exposed,to,each,of,the,treatments,in,each,trial.
c),Having,the,greatest,number,of,subjects,in,the,highest,performing,trial.
,d),Having,each,subject,be,exposed,to,each,treatment,in,the,trial.,,ANS,-
The,correct,answer,is,b.,Simpson's,paradox,is,avoided,by,having,an,equal,number,of,subjects,exposed,to,e
ach,of,the,treatments,in,each,trial.
Due,to,budget,cuts,,a,scientist,had,her,funding,reduced,for,a,research,project.,Her,support,only,enabled,h
er,to,collect,2,data,points,,(2,3.26),and,(4,6.52),.,The,data,points,are,plotted,below.,What,is,your,estimate,
of,the,correlation,coefficient?
a),−1,
b),Zero
c),1,
d),Cannot,be,determined,,ANS,-
The,correct,answer,is,c.,The,correlation,indicated,by,these,two,data,points,would,be,+1,,,though,no,conclu
sions,should,be,drawn,as,more,data,would,need,to,be,collected.
To,better,understand,the,metabolics,of,weight,gain,,appetite,,and,exercise,researchers,looked,at,the,relat
ionship,between,Fat-
Free,Mass,and,Total,Daily,Energy,Intake.,The,scatter,plot,shows,one,result,of,their,research.,What,trend,d
o,you,see?
a),As,FFM,increases,,EI,tends,to,increase.
b),There,is,no,linear,relationship
c),As,Energy,Intake,goes,up,,it,increases,Fat-Free,Mass
d),All,of,the,above,,ANS,-This,scatterplot,indicates,a,positive,correlation.
The,b,in,y=mx+b,is,what?
a),The,point,at,which,the,least,squares,line,crosses,the,y-axis
b),The,value,of,y,when,x=0.
c),Neither,A,nor,B
d),Both,A,and,B,,ANS,-The,b,in,y=mx+b,is,the,point,at,which,the,least,squares,line,crosses,the,y,-
axis,and,the,value,of,y,when,x=0,.
, A,middle,school,principal,wants,to,compare,the,effectiveness,of,two,different,methods,for,teaching,spelli
ng.,She,selects,two,teams,of,students,with,similar,academic,abilities.,Four,teaching,sessions,are,held.,Afte
r,each,session,,the,two,teams,compete,in,a,spelling,match.,
Spelling,Match,Scores,by,Team:,
Which,conclusion,can,be,made?
a),Team,A,performed,better.
b),Team,B,performed,better.
c),There,is,not,a,significant,difference,in,performance,between,the,teams.
d),There,is,a,significant,difference,in,performance,between,the,teams.,,ANS,-
The,correct,answer,is,c.,The,winning,team,alternates,for,each,match,and,the,difference,in,scores,is,roughl
y,the,same,for,matches,1,and,4,,and,for,matches,2,and,3.,Therefore,,we,cannot,say,that,one,team,outperf
ormed,the,other.
Please,select,the,correct,definition,for,least,squares.
a),A,method,that,minimizes,the,squared,distances,of,data,points,from,a,line,that,captures,the,trend,in,pair
ed,data.
b),The,criteria,by,which,the,best-fit,line,is,selected,for,paired,data
c),Both,A,&,B
d),None,of,the,above,,ANS,-The,correct,answer,is,c.,Least,squares,is,the,criteria,by,which,the,best-
fit,line,is,selected,for,paired,data.,It,is,a,method,that,minimizes,the,squared,distances,of,data,points,from,
a,line,that,captures,the,trend,in,paired,data.
How,will,the,removal,of,the,outlier,in,the,following,graph,affect,the,relationship,between,x,and,y,?,
a),It,will,weaken,the,negative,relationship.
b),It,will,strengthen,the,positive,relationship.
c),It,will,strengthen,the,negative,relationship.
d),It,will,weaken,the,positive,relationship.,,ANS,-
he,correct,answer,is,c.,The,dots,move,down,from,left,to,right,(negative,relationship).,Removing,the,outlier
