1
CHAPTER m1:
Questionm1:
Answer:
Statisticsmasmamnumericalmfact mismamnumerical mdata,motherwisemcalled minformation,mused mtomdepict m
anmoccasion,mevent mormwonders.mFormexample,mmidpoints,mmedians,mpercent mand mfilemnumbersmtha
t mhelpmusmcomprehend manmassortment mof mbusinessmand mfinancialmconditions.mStatisticsmasmamdiscipl
inemusesmstatisticsmormnumericalmpiecesmof minformationmtomtakemcaremof mthemproblemm inmthemregular
mworld mand minmscholastics.mIt mismamlogicalmstrategymwhichmismvaluable mformgathering,minvestigation,
mintroduction,mand melucidationmof minformation.
Questionm2:
Answer:
a.mThemdataset mahsm10melements
,2
b.mThemdataset mahsm5mvariables
c.mThemvariablem"carmsize"mismamcategorical mvariablemasmthemobservations mcanmbemcategorized minmthr
eemgroupsm-
"large""compact"mand m"midsize.mThemvariablem "numbermof mcylinder"m isma mquantitativemdatamasmit mi
ndicatesmquantitymof mgasmcylindersminmamcarmengine.m"Milesmper mgallonminmcity"mand m"milesmpermgal
lonminmhighway",mbothmthemvariablesmindicatemquantitymof mfuel.mSomtheymaremquantitativemvariable.m
Themvariablem"fuelmtype"mismamcategoricalmvariablemas mthemobservationsmcanmbemcategorized minmthre
emgroups,mnamelym"Premium",m "Regular"mand m"Diesel".
d.mThemvariablem"carmsize"mis mamcategoricalmvariablemand mit mcanmbemordinal mscale.mBecausemthemord
ermof mthemvaluesmismimportant mand msignificant mbut mthemdifferencembetweenmthemeachmonemismnot mkno
wnmHere,mthemdifferencembetweenmMidsizemand mLargemismsamemormnot)masmthemdifferencembetweenm
themCompact mand mMidsizem(it mcannot mbemdetermine)mand malsominmthemranked mmanner.
Questionm3:
Answer:
a.m
𝑡𝑜𝑡𝑎𝑙m𝑚𝑖𝑙𝑒𝑠m𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑
𝐴𝑣𝑒𝑟𝑎𝑔𝑒m𝑚𝑖𝑙𝑒𝑠m𝑝𝑒𝑟m𝑔𝑎𝑙𝑙𝑜𝑛m𝑓𝑜𝑟m𝑐𝑖𝑡𝑦m𝑑𝑟𝑖𝑣𝑖𝑛𝑔 =
𝑁𝑜. 𝑜𝑓m𝑣𝑒ℎ𝑖𝑐𝑙𝑒𝑠
, 3
13 + 17 + 16 + 34 + 25 + 17 + 5 + 21 + 21
=
10
182
=
10
= 𝟏𝟖. 𝟐m𝒎𝒊𝒍𝒆𝒔m𝒑𝒆𝒓m𝒈𝒂𝒍𝒍𝒐𝒏
b.
𝑡𝑜𝑡𝑎𝑙m𝑚𝑖𝑙𝑒𝑠m𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑
𝐴𝑣𝑒𝑟𝑎𝑔𝑒m𝑚𝑖𝑙𝑒𝑠m𝑝𝑒𝑟m𝑔𝑎𝑙𝑙𝑜𝑛m𝑓𝑜𝑟m𝑐𝑖𝑡𝑦m𝑑𝑟𝑖𝑣𝑖𝑛𝑔 =
𝑁𝑜. 𝑜𝑓m𝑣𝑒ℎ𝑖𝑐𝑙𝑒𝑠
19 + 25 + 25 + 18 + 33 + 33 + 26 + 22 + 31 + 29
=
10
261
=
10
= 𝟐𝟔. 𝟏m𝒎𝒊𝒍𝒆𝒔m𝒑𝒆𝒓m𝒈𝒂𝒍𝒍𝒐𝒏
CHAPTER m2:
Questionm1:
CHAPTER m1:
Questionm1:
Answer:
Statisticsmasmamnumericalmfact mismamnumerical mdata,motherwisemcalled minformation,mused mtomdepict m
anmoccasion,mevent mormwonders.mFormexample,mmidpoints,mmedians,mpercent mand mfilemnumbersmtha
t mhelpmusmcomprehend manmassortment mof mbusinessmand mfinancialmconditions.mStatisticsmasmamdiscipl
inemusesmstatisticsmormnumericalmpiecesmof minformationmtomtakemcaremof mthemproblemm inmthemregular
mworld mand minmscholastics.mIt mismamlogicalmstrategymwhichmismvaluable mformgathering,minvestigation,
mintroduction,mand melucidationmof minformation.
Questionm2:
Answer:
a.mThemdataset mahsm10melements
,2
b.mThemdataset mahsm5mvariables
c.mThemvariablem"carmsize"mismamcategorical mvariablemasmthemobservations mcanmbemcategorized minmthr
eemgroupsm-
"large""compact"mand m"midsize.mThemvariablem "numbermof mcylinder"m isma mquantitativemdatamasmit mi
ndicatesmquantitymof mgasmcylindersminmamcarmengine.m"Milesmper mgallonminmcity"mand m"milesmpermgal
lonminmhighway",mbothmthemvariablesmindicatemquantitymof mfuel.mSomtheymaremquantitativemvariable.m
Themvariablem"fuelmtype"mismamcategoricalmvariablemas mthemobservationsmcanmbemcategorized minmthre
emgroups,mnamelym"Premium",m "Regular"mand m"Diesel".
d.mThemvariablem"carmsize"mis mamcategoricalmvariablemand mit mcanmbemordinal mscale.mBecausemthemord
ermof mthemvaluesmismimportant mand msignificant mbut mthemdifferencembetweenmthemeachmonemismnot mkno
wnmHere,mthemdifferencembetweenmMidsizemand mLargemismsamemormnot)masmthemdifferencembetweenm
themCompact mand mMidsizem(it mcannot mbemdetermine)mand malsominmthemranked mmanner.
Questionm3:
Answer:
a.m
𝑡𝑜𝑡𝑎𝑙m𝑚𝑖𝑙𝑒𝑠m𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑
𝐴𝑣𝑒𝑟𝑎𝑔𝑒m𝑚𝑖𝑙𝑒𝑠m𝑝𝑒𝑟m𝑔𝑎𝑙𝑙𝑜𝑛m𝑓𝑜𝑟m𝑐𝑖𝑡𝑦m𝑑𝑟𝑖𝑣𝑖𝑛𝑔 =
𝑁𝑜. 𝑜𝑓m𝑣𝑒ℎ𝑖𝑐𝑙𝑒𝑠
, 3
13 + 17 + 16 + 34 + 25 + 17 + 5 + 21 + 21
=
10
182
=
10
= 𝟏𝟖. 𝟐m𝒎𝒊𝒍𝒆𝒔m𝒑𝒆𝒓m𝒈𝒂𝒍𝒍𝒐𝒏
b.
𝑡𝑜𝑡𝑎𝑙m𝑚𝑖𝑙𝑒𝑠m𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑
𝐴𝑣𝑒𝑟𝑎𝑔𝑒m𝑚𝑖𝑙𝑒𝑠m𝑝𝑒𝑟m𝑔𝑎𝑙𝑙𝑜𝑛m𝑓𝑜𝑟m𝑐𝑖𝑡𝑦m𝑑𝑟𝑖𝑣𝑖𝑛𝑔 =
𝑁𝑜. 𝑜𝑓m𝑣𝑒ℎ𝑖𝑐𝑙𝑒𝑠
19 + 25 + 25 + 18 + 33 + 33 + 26 + 22 + 31 + 29
=
10
261
=
10
= 𝟐𝟔. 𝟏m𝒎𝒊𝒍𝒆𝒔m𝒑𝒆𝒓m𝒈𝒂𝒍𝒍𝒐𝒏
CHAPTER m2:
Questionm1:
