AP STATS PRACTICE PROBLEMS QUIZ 1-19
QUESTIONS WITH UPDATED ANSWERS GRADED A+
A,group,of,students,played,a,game,in,which,they,earned,points,for,answering,questions,correctly.,The,foll
owing,dotplot,shows,the,total,number,of,points,earned,by,each,student.
Which,of,the,following,is,the,best,description,of,the,distribution,of,points,earned?,ANS,-Bimodal,with,gap
The,table,shows,the,responses,from,103,people,when,asked,if,they,support,a,proposal,to,expand,the,publ
ic,library.
One,person,from,those,who,responded,will,be,selected,at,random.,Which,of,the,following,is,closest,to,the
,probability,that,the,person,will,be,someone,who,responded,no,,given,that,the,person,selected,is,age,55,o
r,older?,ANS,-0.818,(36/44)
Data,were,collected,on,the,fiber,diameter,and,the,fleece,weight,of,the,wool,taken,from,a,sample,of,20,she
ep.,The,data,are,shown,in,the,following,graphs.,Graph,1,is,a,scatterplot,of,fleece,weight,versus,fiber,diam
eter,with,the,respective,least-
,squares,regression,line,shown.,Graph,2,is,the,associated,plot,of,the,residuals,versus,the,predicted,values.
One,point,is,circled,on,graph,1.,Five,point,labeled,A,,B,,C,,D,,and,E,are,identified,on,graph,2.,Which,point,o
n,graph,2,represents,the,residual,for,the,circled,point,on,graph,1?,ANS,-Point,C
The,distributions,of,four,variables,are,shown,in,the,following,histograms.,Which,of,the,following,shapes,is,
NOT,represented,by,one,of,the,four,distributions?,ANS,-Uniform
A,random,sample,of,1,092,people,were,asked,whether,color,was,a,consideration,in,buying,a,new,car.,The
y,were,also,asked,to,identify,one,additional,feature,that,was,important.,The,responses,are,shown,in,the,ta
ble.,
Which,of,the,following,is,closest,to,the,proportion,of,people,who,responded,no,to,color,consideration,and
,who,identified,safety,as,the,additional,feature,that,was,important?,ANS,-0.18,(192/1092,=,0.175)
Scientists,estimate,that,the,distribution,of,the,life,span,of,the,Galapagos,Islands,giant,tortoise,is,approxim
ately,normal,with,mean,100,years,and,standard,deviation,15,years.,based,on,the,estimate,,which,of,the,fo
llowing,is,closest,to,the,age,of,the,Galapagos,Islands,giant,tortoise,at,the,90th,percentile,of,the,distributio
n,?,ANS,-120,years,(,inverse,norm,on,calc,,area,=,0.9,,mean,=,100,,SD=,15)
QUESTIONS WITH UPDATED ANSWERS GRADED A+
A,group,of,students,played,a,game,in,which,they,earned,points,for,answering,questions,correctly.,The,foll
owing,dotplot,shows,the,total,number,of,points,earned,by,each,student.
Which,of,the,following,is,the,best,description,of,the,distribution,of,points,earned?,ANS,-Bimodal,with,gap
The,table,shows,the,responses,from,103,people,when,asked,if,they,support,a,proposal,to,expand,the,publ
ic,library.
One,person,from,those,who,responded,will,be,selected,at,random.,Which,of,the,following,is,closest,to,the
,probability,that,the,person,will,be,someone,who,responded,no,,given,that,the,person,selected,is,age,55,o
r,older?,ANS,-0.818,(36/44)
Data,were,collected,on,the,fiber,diameter,and,the,fleece,weight,of,the,wool,taken,from,a,sample,of,20,she
ep.,The,data,are,shown,in,the,following,graphs.,Graph,1,is,a,scatterplot,of,fleece,weight,versus,fiber,diam
eter,with,the,respective,least-
,squares,regression,line,shown.,Graph,2,is,the,associated,plot,of,the,residuals,versus,the,predicted,values.
One,point,is,circled,on,graph,1.,Five,point,labeled,A,,B,,C,,D,,and,E,are,identified,on,graph,2.,Which,point,o
n,graph,2,represents,the,residual,for,the,circled,point,on,graph,1?,ANS,-Point,C
The,distributions,of,four,variables,are,shown,in,the,following,histograms.,Which,of,the,following,shapes,is,
NOT,represented,by,one,of,the,four,distributions?,ANS,-Uniform
A,random,sample,of,1,092,people,were,asked,whether,color,was,a,consideration,in,buying,a,new,car.,The
y,were,also,asked,to,identify,one,additional,feature,that,was,important.,The,responses,are,shown,in,the,ta
ble.,
Which,of,the,following,is,closest,to,the,proportion,of,people,who,responded,no,to,color,consideration,and
,who,identified,safety,as,the,additional,feature,that,was,important?,ANS,-0.18,(192/1092,=,0.175)
Scientists,estimate,that,the,distribution,of,the,life,span,of,the,Galapagos,Islands,giant,tortoise,is,approxim
ately,normal,with,mean,100,years,and,standard,deviation,15,years.,based,on,the,estimate,,which,of,the,fo
llowing,is,closest,to,the,age,of,the,Galapagos,Islands,giant,tortoise,at,the,90th,percentile,of,the,distributio
n,?,ANS,-120,years,(,inverse,norm,on,calc,,area,=,0.9,,mean,=,100,,SD=,15)
