Test Bank for Business Statistics: Communicating with Numbers 2nd Edition by Sanjiv Jaggia, Alison Kelly

Test Bank for Business Statistics Communicating
with Numbers 2nd Edition Jaggia
Chapter 02

1. Ayfrequencyydistributionyforyqualitativeydataygroupsytheseydatayintoyclasse

sycalledyintervalsyandyrecordsytheytotalynumberyofyobservationsyinyeachycla

ss.



True False


2. Theyrelativeyfrequencyyofyaycategoryyisycalculatedybyydividingytheycategory'syfr

equencyybyytheytotalynumberyofyobservations.



True False


3. Theypercentyfrequencyyofyaycategoryyequalsytheyfrequencyyofytheycategoryymulti
pliedybyy100%.



True False


4. Aypieychartyisyaysegmentedycircleythatyportraysytheycategoriesyandyr

elativeysizesyofysomeyquantitativeyvariable.



True False


5. Aybarychartydepictsytheyfrequencyyoryrelativeyfrequencyyofyeachycategoryyofyqu

alitativeydatayasyaybaryrisingyverticallyyfromytheyhorizontalyaxis.yItyisyalsoyaccep

tableyforytheybarytoyextendyhorizontallyyfromytheyverticalyaxis.



True False

,6. Aybarychartymayybeydisplayedyhorizontally.



True False


7. Toyapproximateytheywidthyofyayclassyinytheycreationyofyaybarychart,yweymayyuseythisyformula:




True False


8. Foryquantitativeydata,yayrelativeyfrequencyydistributionyidentifiesytheyproportionyofyobservationsythatyfally

intoyeachyclass.



True False


9. Foryquantitativeydata,yaycumulativeyrelativeyfrequencyydistributionyrecordsytheyproportiony(fraction)yofy

valuesythatyfallybelowytheyupperylimityofyeachyclass.



True False


10. Ayhistogramyisyayseriesyofyrectanglesywhereytheywidthyandyheightyofyeachyrectangleyrepresentytheyfreq

uencyy(oryrelativeyfrequency)yandytheywidthyofytheyclass,yrespectively.



True False

,11. Aypolygonyconnectsyayseriesyofyneighboringypointsywhereyeachypointyrepresentsytheymidpointyofyaypart

icularyclassyandyitsyassociatedyfrequencyyoryrelativeyfrequency.



True False


12. Anyogiveyisyaygraphythatyplotsytheycumulativeyfrequencyy(orytheycumulativeyrelativeyfrequency)yofyeac

hyclassyaboveytheylowerylimityofytheycorrespondingyclass.



True False


13. Aystem-and-

leafydiagramyisyusefulyinythatyitygivesyanyoverallypictureyofywhereyquantitativeydatayareycenteredyandyho

wytheydatayareydispersedyfromytheycenter.



True False


14. Ayscatterplotyisyaygraphicalytoolythatyhelpsydetermineywhetheryorynotytwoyquantitativeyvariablesyareyrela

ted.



True False


15. Whenyconstructingyayscatterplotyforytwoyquantitativeyvariables,yweyusuallyyreferytoyoneyvariableyas

x and another one as y. Typically, we graph x on the vertical axis and y on the horizontal axis.
y y y y y y y y y y y y y y y y y y y




True False


16. Whenyconstructingyaypieychart,yonlyyayfew,ytheymostyfrequent,ycategoriesymustybeyincludedyinytheypie.



True False

, 17. Whenysummarizingyquantitativeydatayityisyalwaysybetterytoyhaveyupytoy30yclassesyinyayfrequencyydistr

ibution.



True False


18. Scatterplotyisyaygraphicalytoolythatyisyfocusedyonydescribingyoneyvariable.



True False


19. Frequencyydistributionsymayybeyusedytoydescribeywhichyofytheyfollowingytypesyofydata?




A. Nominalyandyordinalydatayonly

B. Nominalyandyintervalydatayonly

C. Nominal,yordinal,yandyintervalydatayonly

D. Nominal,yordinal,yinterval,yandyratioydata


20. Inyorderytoysummarizeyqualitativeydata,yayusefulytoolyisyay .




A. histogram

B. frequencyydistribution

C. stem-and-leafydiagram

D. Allyofytheyabove