商务统计学笔试复习题Word文件下载.docx

商务统计学笔试复习题Word文件下载.docx

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c

3.thepossibleresponsestothequestion"

Howmanyvideocassetterecordersmadebyothermanufacturershaveyouused?

"

arevaluesfroma

a）discreterandomvariable.

b）continuousrandomvariable.

c）categoricalrandomvariable.

d）parameter.

4.thepossibleresponsestothequestion"

Areyouhappy,indifferent,orunhappywiththeperformanceperdollarspentonthevideocassetterecorder?

a）discretenumericalrandomvariable.

b）continuousnumericalrandomvariable.

TYPE:

MCDIFFICULTY:

Easy

KEYWORDS:

categoricalrandomvariable,typesofdata

5.thepossibleresponsestothequestion"

Whatisyourannualincomeroundedtothenearestthousands?

6.thepossibleresponsestothequestion"

Howmuchtimedoyouusethevideocassetterecordereveryweekontheaverage?

b

7.thepossibleresponsestothequestion"

Howmanypeoplearethereinyourhousehold?

8.thepossibleresponsestothequestion"

Howwouldyouratethequalityofyourpurchaseexperiencewith1=excellent,2=good,3=decent,4=poor,5=terrible?

c

9.thepossibleresponsestothequestion"

Whatbrandofvideocassetterecorderdidyoupurchase?

10.thepossibleresponsestothequestion"

Outofa100pointscorewith100beingthehighestand0beingthelowest,whatisyoursatisfactionlevelonthevideocassetterecorderthatyoupurchased?

11.thepossibleresponsestothequestion"

Inwhichyearwereyouborn?

二、Thechancellorofamajoruniversitywasconcernedaboutalcoholabuseonhercampusandwantedtofindouttheproportionofstudentsatheruniversitywhovisitedcampusbarsontheweekendbeforethefinalexamweek.Herassistanttookarandomsampleof250students.Thetotalnumberofstudentsinthesamplewhovisitedcampusbarsontheweekendbeforethefinalexamweekisanexampleof

e）acategoricalrandomvariable.

f）adiscreterandomvariable.

g）acontinuousrandomvariable.

h）aparameter.

三、Thechancellorofamajoruniversitywasconcernedaboutalcoholabuseonhercampusandwantedtofindouttheproportionofstudentsatheruniversitywhovisitedcampusbarsontheweekendbeforethefinalexamweek.Herassistanttookarandomsampleof250studentsandcomputedtheportionofstudentsinthesamplewhovisitedcampusbarsontheweekendbeforethefinalexam.Theportionofallstudentsatheruniversitywhovisitedcampusbarsontheweekendbeforethefinalexamweekisanexampleof

i）acategoricalrandomvariable.

j）adiscreterandomvariable.

k）acontinuousrandomvariable.

l）aparameter.

d

四、Thechancellorofamajoruniversitywasconcernedaboutalcoholabuseonhercampusandwantedtofindouttheproportionofstudentsatheruniversitywhovisitedcampusbarsontheweekendbeforethefinalexamweek.Herassistanttookarandomsampleof250students.Theportionofstudentsinthesamplewhovisitedcampusbarsontheweekendbeforethefinalexamweekisanexampleof__________.

m）acategoricalrandomvariable.

n）adiscreterandomvariable.

o）aparameter.

p）astatistic

五、Theorderedarraybelowresultedfromtakingasampleof25batchesof500computerchipsanddetermininghowmanyineachbatchweredefective.

Defects

1244556799121215

172021232325262727282929

1.ReferringtoTable2-11,ifafrequencydistributionforthedefectsdataisconstructed,using"

0butlessthan5"

asthefirstclass,thefrequencyofthe“20butlessthan25”classwouldbe________.

4

2.ReferringtoTable2-11,ifafrequencydistributionforthedefectsdataisconstructed,using"

asthefirstclass,therelativefrequencyofthe“15butlessthan20”classwouldbe________.

0.08or8%or2/25

3.ReferringtoTable2-11,constructafrequencydistributionforthedefectsdata,using"

asthefirstclass.

DefectsFrequency

0butlessthan54

5butlessthan106

10butlessthan152

15butlessthan202

20butlessthan254

25butlessthan307

4.ReferringtoTable2-11,constructarelativefrequencyorpercentagedistributionforthedefectsdata,using"

DefectsPercentage

0butlessthan516

5butlessthan1024

10butlessthan158

15butlessthan208

20butlessthan2516

25butlessthan3028

5.ReferringtoTable2-11,constructacumulativepercentagedistributionforthedefectsdataifthecorrespondingfrequencydistributionuses"

DefectsCumPct

00

516

1040

1548

2056

2572

30100

6.ReferringtoTable2-11,constructahistogramforthedefectsdata,using"

7.ReferringtoTable2-11,constructacumulativepercentagepolygonforthedefectsdataifthecorrespondingfrequencydistributionuses"

六、Healthcareissuesarereceivingmuchattentioninbothacademicandpoliticalarenas.Asociologistrecentlyconductedasurveyofcitizensover60yearsofagewhosenetworthistoohightoqualifyforMedicaidandhavenoprivatehealthinsurance.Theagesof25uninsuredseniorcitizenswereasfollows:

60616263646566686869707373

747576768181828687899092

1.ReferringtoTable3-1,calculatethearithmeticmeanageoftheuninsuredseniorcitizenstothenearesthundredthofayear.

74.04years

2.ReferringtoTable3-1,identifythemedianageoftheuninsuredseniorcitizens.

73years

3.ReferringtoTable3-1,identifythefirstquartileoftheagesoftheuninsuredseniorcitizens.

65.5years

4.ReferringtoTable3-1,identifythethirdquartileoftheagesoftheuninsuredseniorcitizens.

81.5years

5.ReferringtoTable3-1,identifytheinterquartilerangeoftheagesoftheuninsuredseniorcitizens.

16years

6.ReferringtoTable3-1,identifywhichofthefollowingisthecorrectstatement.

a）Onefourthoftheseniorcitizenssampledarebelow65.5yearsofage.

b）Themiddle50%oftheseniorcitizenssampledarebetween65.5and73.0yearsofage.

c）Theaverageageofseniorcitizenssampledis73.5yearsofage.

d）Alloftheabovearecorrect.

7.ReferringtoTable3-1,identifywhichofthefollowingisthecorrectstatement.

a）Onefourthoftheseniorcitizenssampledarebelow64yearsofage.

c）25%oftheseniorcitizenssampledareolderthan81.5yearsofage.

8.ReferringtoTable3-1,whattypeofshapedoesthedistributionofthesampleappeartohave?

Slightlypositiveorright-skewed.

9.ReferringtoTable3-1,calculatethevarianceoftheagesoftheuninsuredseniorcitizenscorrecttothenearesthundredthofayearsquared.

94.96years2

10.ReferringtoTable3-1,calculatethestandarddeviationoftheagesoftheuninsuredseniorcitizenscorrecttothenearesthundredthofayear.

9.74years

11.ReferringtoTable3-1,calculatethecoefficientofvariationoftheagesoftheuninsuredseniorcitizens.

13.16%

七、Thestem-and-leafdisplaybelowrepresentsthenumberofcargomanifestsapprovedbycustomsinspectorsofthePortofNewYorkinasampleof35days.

STEMLEAVES

1H67889

2L0011122223333444

2H5566678899

3L1122

Note

（1）:

1Hmeansthe“highteens”15,16,17,18,or19;

2Lmeansthe“lowtwenties”20,21,22,23,or24;

2Hmeansthe“hightwenti