STRAIGHTERLINE BUSINESS STATS
FINAL WITH CORRECT QUESTIONS
AND ANSWERS
The6main6purpose6of6descriptive6statistics6is6to6-6answer-
Summarize6data6in6a6useful6and6informative6manner
Which6word6is6NOT6part6of6the6definition6of6descriptive6statistics?6-6answer-Predicting
A6marketing6class6of6506students6evaluated6the6instructor6using6the6following6scale:6su
perior,6good,6average,6poor,6and6inferior.6The6descriptive6summary6showed6the6followin
g6survey6results:62%6superior,68%6good,645%6average,645%6poor,6and60%6inferior.6-
6answer-c.6Most6students6rated6the6instructor6as6poor6or6average.
What6type6of6variable6is6the6number6of6robberies6reported6in6your6city?6-6answer-
Quantitative
The6Nielsen6Ratings6break6down6the6number6of6people6watching6a6particular6television6
show6by6age.6What6level6of6measurement6is6age?6-6answer-Ratio
What6level6of6measurement6is6a6person's6"favorite6sport"?6-6answer-Nominal
The6final6rankings6of6the6top6206NCAA6college6basketball6teams6are6an6example6of6whi
ch6level6of6measurement?6-6answer-Ordinal
What6level6of6measurement6is6the6Centigrade6temperature6scale?6-6answer-Interval
A6survey6includes6a6question6regarding6marital6status6that6has6the6following6responses:
6single,6married,6divorced,6separated,6or6widowed.6What6is6the6scale6of6measurement6f
or6this6question?6-6answer-Nominal
,A6group6of6women6tried6five6brands6of6fingernail6polish6and6ranked6them6according6to6p
reference.6What6level6of6measurement6is6this?6-6answer-Ordinal
Shoe6style6is6an6example6of6what6level6of6measurement?6-6answer-Nominal
When6TV6advertisements6report6"26out6of636dentists6surveyed6indicated6they6would6rec
ommend6Brand6X6toothpaste6to6their6patients,"6an6informed6consumer6may6question6th
e6conclusion6because6the:6-6answer-
Advertisement6does6not6include6the6total6number6of6dentists6surveyed
A6sample6of6the6paramedical6fees6charged6by6clinics6revealed6these6amounts:6$55,6$4
9,6$50,6$45,6$52,6and6$55.6What6is6the6median6charge?6-6answer-51.00
For6a6data6set6with6an6odd6number6of6observations6that6have6been6sorted6from6smalles
t6to6largest6values,6where6is6the6median6located?6-6answer-(n6+61)/2
Assume6a6student6received6the6following6grades6for6the6semester:6History,6B;6Statistics
,6A;6Spanish,6C;6and6English,6C.6History6and6English6are656credit-
hour6courses,6Statistics6a646credit-hour6course,6and6Spanish6a636credit-
hour6course.6If646grade6points6are6assigned6for6an6A,636for6a6B,6and626for6a6C,6what6is6t
he6weighted6mean6grade6for6the6semester?6-6answer-2.76
A6disadvantage6of6using6an6arithmetic6mean6to6summarize6a6set6of6data6is6that6______
____.6-6answer-It6can6be6biased6by6one6or6two6extremely6small6or6large6values
A6survey6item6asked6students6to6indicate6their6class6in6college:6freshman,6sophomore,6j
unior,6or6senior.6Which6measure(s)6of6central6location6would6be6appropriate6for6the6dat
a6generated6by6that6questionnaire6item?6-6answer-Mode6and6median
The6times6(in6minutes)6that6several6underwriters6took6to6review6applications6for6similar6i
nsurance6coverage6are650,6230,652,6and657.6What6is6the6median6length6of6time6require
d6to6review6an6application?6-6answer-54.5
For6the6most6recent6seven6years,6the6U.S.6Department6of6Education6reported6the6follow
ing6number6of6bachelor's6degrees6awarded6in6computer6science:64,033;65,652;66,407;67
,201;68,719;611,154;615,121.6What6is6the6annual6arithmetic6mean6number6of6degrees6a
warded?6-6answer-About68,327
Which6of6the6following6measures6of6dispersion6are6based6on6deviations6from6the6mean
?6-6answer-All6apply
From6the6easiest6to6the6hardest6"ease6of6interpretation,"6rank6the6measures6of6dispersi
on.6-6answer-Range,6mean6deviation,6variance
The6weights6of6a6sample6of6crates6ready6for6shipment6to6Moscow,6Russia6are6(in6kilogr
ams):6103,697,6101,6106,6and6103.6What6is6the6mean6deviation?6-6answer-2.46kg
, A6sample6of6assistant6professors6on6the6business6faculty6at6state-
supported6institutions6in6Ohio6revealed6the6mean6income6to6be6$72,0006for6nine6month
s,6with6a6standard6deviation6of6$3,000.6Using6Chebyshev's6Theorem,6what6proportion6o
f6the6faculty6earns6more6than6$66,000,6but6less6than6$78,000?6-6answer-At6least675%
Based6on6the6Empirical6Rule,6what6percent6of6the6observations6will6lie6between6plus6or6
minus6two6standard6deviations6from6the6mean?6-6answer-95%
What6is6the6relationship6between6the6variance6and6the6standard6deviation?6-6answer-
Variance6is6the6square6of6the6standard6deviation.
What6statistics6are6needed6to6draw6a6box6plot?6-6answer-
The6minimum,6maximum,6median,6first6and6third6quartiles
A6box6plot6shows6___________.6-6answer-
The6relative6symmetry6of6a6distribution6for6a6set6of6data
A6dot6plot6can6be6used6to6show6_________________.6-6answer-
The6distribution6for6a6quantitative6variable
If6a6student6places6in6the699th6percentile6on6an6exam,6she6performed6better6than699%6
of6all6students6who6completed6the6exam.6Her6performance6is6similar6to6a6statement6bas
ed6on6a6__________.6-6answer-Cumulative6frequency6distribution
To6locate6the6percentile6for6a6given6observation6in6a6data6set,6the6data6must6be6______
_____.6-6answer-Sorted6and6listed6from6the6minimum6to6the6maximum6values
The6test6scores6for6a6class6of61476students6are6computed.6What6is6the6location6of6the6t
est6score6associated6with6the6third6quartile?6-6answer-111
In6a6distribution,6the6second6quartile6corresponds6with6the6__________.6-6answer-
Median
A6dot6plot6shows6____________.6-6answer-The6general6shape6of6a6distribution
The6range6of6the6coefficient6of6skewness6is6____________.6-6answer-
Both6positive6and6negative6values
A6sample6of6experienced6typists6revealed6that6their6mean6typing6speed6is6876words6per
6minute6and6the6median6typing6speed6is6736words6per6minute.6The6standard6deviation6
of6typing6speed6is616.96words6per6minute.6What6is6the6Pearson6coefficient6of6skewness
?6-6answer-+2.5
If6the6coefficient6of6skewness6is6equal6to6zero,6the6shape6of6the6distribution6is6_______
___.6-6answer-Symmetric
FINAL WITH CORRECT QUESTIONS
AND ANSWERS
The6main6purpose6of6descriptive6statistics6is6to6-6answer-
Summarize6data6in6a6useful6and6informative6manner
Which6word6is6NOT6part6of6the6definition6of6descriptive6statistics?6-6answer-Predicting
A6marketing6class6of6506students6evaluated6the6instructor6using6the6following6scale:6su
perior,6good,6average,6poor,6and6inferior.6The6descriptive6summary6showed6the6followin
g6survey6results:62%6superior,68%6good,645%6average,645%6poor,6and60%6inferior.6-
6answer-c.6Most6students6rated6the6instructor6as6poor6or6average.
What6type6of6variable6is6the6number6of6robberies6reported6in6your6city?6-6answer-
Quantitative
The6Nielsen6Ratings6break6down6the6number6of6people6watching6a6particular6television6
show6by6age.6What6level6of6measurement6is6age?6-6answer-Ratio
What6level6of6measurement6is6a6person's6"favorite6sport"?6-6answer-Nominal
The6final6rankings6of6the6top6206NCAA6college6basketball6teams6are6an6example6of6whi
ch6level6of6measurement?6-6answer-Ordinal
What6level6of6measurement6is6the6Centigrade6temperature6scale?6-6answer-Interval
A6survey6includes6a6question6regarding6marital6status6that6has6the6following6responses:
6single,6married,6divorced,6separated,6or6widowed.6What6is6the6scale6of6measurement6f
or6this6question?6-6answer-Nominal
,A6group6of6women6tried6five6brands6of6fingernail6polish6and6ranked6them6according6to6p
reference.6What6level6of6measurement6is6this?6-6answer-Ordinal
Shoe6style6is6an6example6of6what6level6of6measurement?6-6answer-Nominal
When6TV6advertisements6report6"26out6of636dentists6surveyed6indicated6they6would6rec
ommend6Brand6X6toothpaste6to6their6patients,"6an6informed6consumer6may6question6th
e6conclusion6because6the:6-6answer-
Advertisement6does6not6include6the6total6number6of6dentists6surveyed
A6sample6of6the6paramedical6fees6charged6by6clinics6revealed6these6amounts:6$55,6$4
9,6$50,6$45,6$52,6and6$55.6What6is6the6median6charge?6-6answer-51.00
For6a6data6set6with6an6odd6number6of6observations6that6have6been6sorted6from6smalles
t6to6largest6values,6where6is6the6median6located?6-6answer-(n6+61)/2
Assume6a6student6received6the6following6grades6for6the6semester:6History,6B;6Statistics
,6A;6Spanish,6C;6and6English,6C.6History6and6English6are656credit-
hour6courses,6Statistics6a646credit-hour6course,6and6Spanish6a636credit-
hour6course.6If646grade6points6are6assigned6for6an6A,636for6a6B,6and626for6a6C,6what6is6t
he6weighted6mean6grade6for6the6semester?6-6answer-2.76
A6disadvantage6of6using6an6arithmetic6mean6to6summarize6a6set6of6data6is6that6______
____.6-6answer-It6can6be6biased6by6one6or6two6extremely6small6or6large6values
A6survey6item6asked6students6to6indicate6their6class6in6college:6freshman,6sophomore,6j
unior,6or6senior.6Which6measure(s)6of6central6location6would6be6appropriate6for6the6dat
a6generated6by6that6questionnaire6item?6-6answer-Mode6and6median
The6times6(in6minutes)6that6several6underwriters6took6to6review6applications6for6similar6i
nsurance6coverage6are650,6230,652,6and657.6What6is6the6median6length6of6time6require
d6to6review6an6application?6-6answer-54.5
For6the6most6recent6seven6years,6the6U.S.6Department6of6Education6reported6the6follow
ing6number6of6bachelor's6degrees6awarded6in6computer6science:64,033;65,652;66,407;67
,201;68,719;611,154;615,121.6What6is6the6annual6arithmetic6mean6number6of6degrees6a
warded?6-6answer-About68,327
Which6of6the6following6measures6of6dispersion6are6based6on6deviations6from6the6mean
?6-6answer-All6apply
From6the6easiest6to6the6hardest6"ease6of6interpretation,"6rank6the6measures6of6dispersi
on.6-6answer-Range,6mean6deviation,6variance
The6weights6of6a6sample6of6crates6ready6for6shipment6to6Moscow,6Russia6are6(in6kilogr
ams):6103,697,6101,6106,6and6103.6What6is6the6mean6deviation?6-6answer-2.46kg
, A6sample6of6assistant6professors6on6the6business6faculty6at6state-
supported6institutions6in6Ohio6revealed6the6mean6income6to6be6$72,0006for6nine6month
s,6with6a6standard6deviation6of6$3,000.6Using6Chebyshev's6Theorem,6what6proportion6o
f6the6faculty6earns6more6than6$66,000,6but6less6than6$78,000?6-6answer-At6least675%
Based6on6the6Empirical6Rule,6what6percent6of6the6observations6will6lie6between6plus6or6
minus6two6standard6deviations6from6the6mean?6-6answer-95%
What6is6the6relationship6between6the6variance6and6the6standard6deviation?6-6answer-
Variance6is6the6square6of6the6standard6deviation.
What6statistics6are6needed6to6draw6a6box6plot?6-6answer-
The6minimum,6maximum,6median,6first6and6third6quartiles
A6box6plot6shows6___________.6-6answer-
The6relative6symmetry6of6a6distribution6for6a6set6of6data
A6dot6plot6can6be6used6to6show6_________________.6-6answer-
The6distribution6for6a6quantitative6variable
If6a6student6places6in6the699th6percentile6on6an6exam,6she6performed6better6than699%6
of6all6students6who6completed6the6exam.6Her6performance6is6similar6to6a6statement6bas
ed6on6a6__________.6-6answer-Cumulative6frequency6distribution
To6locate6the6percentile6for6a6given6observation6in6a6data6set,6the6data6must6be6______
_____.6-6answer-Sorted6and6listed6from6the6minimum6to6the6maximum6values
The6test6scores6for6a6class6of61476students6are6computed.6What6is6the6location6of6the6t
est6score6associated6with6the6third6quartile?6-6answer-111
In6a6distribution,6the6second6quartile6corresponds6with6the6__________.6-6answer-
Median
A6dot6plot6shows6____________.6-6answer-The6general6shape6of6a6distribution
The6range6of6the6coefficient6of6skewness6is6____________.6-6answer-
Both6positive6and6negative6values
A6sample6of6experienced6typists6revealed6that6their6mean6typing6speed6is6876words6per
6minute6and6the6median6typing6speed6is6736words6per6minute.6The6standard6deviation6
of6typing6speed6is616.96words6per6minute.6What6is6the6Pearson6coefficient6of6skewness
?6-6answer-+2.5
If6the6coefficient6of6skewness6is6equal6to6zero,6the6shape6of6the6distribution6is6_______
___.6-6answer-Symmetric
