CHAPTER 3 REVIEW QUESTIONS WITH
COMPLETE ANSWERS
Given wwthe wwfollowing wwset wwof wwsample wwscores, wwcalculate wwthe wwsample
wwmean.
3,4,5,6,8,10
wwa. ww6 ww
wwb. ww4 ww
wwc. ww3 ww
wwd. ww5 ww- wwAnswer wwA
Which wwof wwthe wwfollowing wwis wwnot wwan wwappropriate wwdefinition wwof wwthe
wwmean?
wwa. wwThe wwmiddle wwof wwall wwof wwthe wwscores wwonce wwthey wware wwordered wwfrom
wwleast wwto wwgreatest ww
wwb. wwThe wwbalance wwpoint wwfor wwa wwdistribution ww
wwc. wwThe wwsum wwof wwthe wwscores wwdivided wwby wwthe wwnumber wwof wwscores ww
wwd. wwThe wwamount wweach wwindividual wwreceives wwwhen wwthe wwtotal wwof wwthe
wwscores wwis wwsplit wwequally ww- wwAnswer wwA
A wwteacher wwgave wwa wwquiz wwto wwher wwclass wwof ww30 wwstudents. wwHowever, wwshe
wwmisplaced wwone wwof wwthe wwquizzes. wwThe wwteacher wwcalculated wwthe wwmean wwof
wwthe ww29 wwquizzes wwto wwbe wwμ= ww68 wwpoints. wwAt wwthis wwpoint, wwthe wwteacher
wwfound wwthe wwmissing wwquiz. wwOn wwthis wwquiz, wwthe wwstudent wwscored ww98
wwpoints. wwWhat wwis wwthe wwmean wwfor wwthe wwclass wwof wwall ww30 wwstudents?
wwa. ww69 ww
wwb. ww83 ww
wwc. ww65.7 ww
wwd. ww68 ww- wwAnswer wwA
The wwmean wwof wwa wwset wwof wwscores wwis wwμ= ww125. wwIf wwwe wwremove wwthe
wwscore ww122 wwfrom wwthe wwset, wwwhat wwwill wwhappen wwto wwthe wwmean?
wwa. wwThe wwmean wwwill wwincrease. ww
wwb. wwThe wwmean wwwill wwstay wwthe wwsame. ww
wwc. wwThe wwmean wwwill wwdecrease. ww
wwd. wwIt wwis wwimpossible wwto wwknow wwwhat wwwill wwhappen wwto wwthe wwmean
wwwithout wwknowing wwthe wwindividual wwscores. ww- wwAnswer wwA
, Given wwthe wwfollowing wwfrequency wwdistribution wwtable, wwif wwall wwscores wware
wwincreased wwby ww5, wwwhat wwwill wwthe wwnew wwmean wwbe?
X ww. wwF
1 ww. ww5
2 ww. ww3
3 ww. ww3
4 ww. ww1
wwa. ww2 ww
wwb. ww7 ww
wwc. ww1 ww
wwd. ww10 ww- wwAnswer wwB
What wwscore wwcan wwbe wwadded wwto wwthe wwfollowing wwdata wwset wwin wworder wwfor
wwthe wwnew wwmedian wwto wwbe ww12?
3, ww3, ww6, ww10, ww14, ww15, ww17
wwa. ww10 ww
wwb. ww16 ww
wwc. ww13 ww
wwd. ww12 ww- wwAnswer wwB
If wwthe wwmedian wwis wwremoved wwfrom wwa wwdata wwset, wwwhat wwcan wwyou
wwdetermine wwabout wwthe wwnew wwmedian?
wwa. wwThe wwnew wwmedian wwis wwequal wwto wwthe wworiginal wwmedian. ww
wwb. wwThe wwnew wwmedian wwis wwless wwthan wwthe wworiginal wwmedian. ww
wwc. wwThe wwnew wwmedian wwis wwgreater wwthan wwthe wworiginal wwmedian. ww
wwd. wwThere wwis wwnothing wwyou wwcan wwdetermine wwabout wwthe wwnew wwmedian
wwwithout wwknowing wwthe wwlist wwof wwscores. ww- wwAnswer wwD
A wwscientist wwcannot wwread wwa wwdata wwpoint wwin wwa wwlist wwof wwweights wwof
wwnewborn wwbabies. wwThe wwreport, wwhowever, wwnotes wwthat wwthe wwmedian wwweight
wwis ww8.6. wwWhat wwis wwthe wwmissing wwweight?
7.6, ww8.1, ww_____, ww8.8, ww8.8, ww8.9
wwa. ww8.1 ww
wwb. ww8.4 ww
wwc. ww8.6 ww
wwd. ww8.8 ww- wwAnswer wwB
A wwsurvey wwcollected wwdata wwon wwpeople's wwfavorite wwtype wwof wwmovie. wwThe
wwfollowing wwtable wwlists wwthe wwresults.
TABLE
COMPLETE ANSWERS
Given wwthe wwfollowing wwset wwof wwsample wwscores, wwcalculate wwthe wwsample
wwmean.
3,4,5,6,8,10
wwa. ww6 ww
wwb. ww4 ww
wwc. ww3 ww
wwd. ww5 ww- wwAnswer wwA
Which wwof wwthe wwfollowing wwis wwnot wwan wwappropriate wwdefinition wwof wwthe
wwmean?
wwa. wwThe wwmiddle wwof wwall wwof wwthe wwscores wwonce wwthey wware wwordered wwfrom
wwleast wwto wwgreatest ww
wwb. wwThe wwbalance wwpoint wwfor wwa wwdistribution ww
wwc. wwThe wwsum wwof wwthe wwscores wwdivided wwby wwthe wwnumber wwof wwscores ww
wwd. wwThe wwamount wweach wwindividual wwreceives wwwhen wwthe wwtotal wwof wwthe
wwscores wwis wwsplit wwequally ww- wwAnswer wwA
A wwteacher wwgave wwa wwquiz wwto wwher wwclass wwof ww30 wwstudents. wwHowever, wwshe
wwmisplaced wwone wwof wwthe wwquizzes. wwThe wwteacher wwcalculated wwthe wwmean wwof
wwthe ww29 wwquizzes wwto wwbe wwμ= ww68 wwpoints. wwAt wwthis wwpoint, wwthe wwteacher
wwfound wwthe wwmissing wwquiz. wwOn wwthis wwquiz, wwthe wwstudent wwscored ww98
wwpoints. wwWhat wwis wwthe wwmean wwfor wwthe wwclass wwof wwall ww30 wwstudents?
wwa. ww69 ww
wwb. ww83 ww
wwc. ww65.7 ww
wwd. ww68 ww- wwAnswer wwA
The wwmean wwof wwa wwset wwof wwscores wwis wwμ= ww125. wwIf wwwe wwremove wwthe
wwscore ww122 wwfrom wwthe wwset, wwwhat wwwill wwhappen wwto wwthe wwmean?
wwa. wwThe wwmean wwwill wwincrease. ww
wwb. wwThe wwmean wwwill wwstay wwthe wwsame. ww
wwc. wwThe wwmean wwwill wwdecrease. ww
wwd. wwIt wwis wwimpossible wwto wwknow wwwhat wwwill wwhappen wwto wwthe wwmean
wwwithout wwknowing wwthe wwindividual wwscores. ww- wwAnswer wwA
, Given wwthe wwfollowing wwfrequency wwdistribution wwtable, wwif wwall wwscores wware
wwincreased wwby ww5, wwwhat wwwill wwthe wwnew wwmean wwbe?
X ww. wwF
1 ww. ww5
2 ww. ww3
3 ww. ww3
4 ww. ww1
wwa. ww2 ww
wwb. ww7 ww
wwc. ww1 ww
wwd. ww10 ww- wwAnswer wwB
What wwscore wwcan wwbe wwadded wwto wwthe wwfollowing wwdata wwset wwin wworder wwfor
wwthe wwnew wwmedian wwto wwbe ww12?
3, ww3, ww6, ww10, ww14, ww15, ww17
wwa. ww10 ww
wwb. ww16 ww
wwc. ww13 ww
wwd. ww12 ww- wwAnswer wwB
If wwthe wwmedian wwis wwremoved wwfrom wwa wwdata wwset, wwwhat wwcan wwyou
wwdetermine wwabout wwthe wwnew wwmedian?
wwa. wwThe wwnew wwmedian wwis wwequal wwto wwthe wworiginal wwmedian. ww
wwb. wwThe wwnew wwmedian wwis wwless wwthan wwthe wworiginal wwmedian. ww
wwc. wwThe wwnew wwmedian wwis wwgreater wwthan wwthe wworiginal wwmedian. ww
wwd. wwThere wwis wwnothing wwyou wwcan wwdetermine wwabout wwthe wwnew wwmedian
wwwithout wwknowing wwthe wwlist wwof wwscores. ww- wwAnswer wwD
A wwscientist wwcannot wwread wwa wwdata wwpoint wwin wwa wwlist wwof wwweights wwof
wwnewborn wwbabies. wwThe wwreport, wwhowever, wwnotes wwthat wwthe wwmedian wwweight
wwis ww8.6. wwWhat wwis wwthe wwmissing wwweight?
7.6, ww8.1, ww_____, ww8.8, ww8.8, ww8.9
wwa. ww8.1 ww
wwb. ww8.4 ww
wwc. ww8.6 ww
wwd. ww8.8 ww- wwAnswer wwB
A wwsurvey wwcollected wwdata wwon wwpeople's wwfavorite wwtype wwof wwmovie. wwThe
wwfollowing wwtable wwlists wwthe wwresults.
TABLE
