2. DATADATA!!!!
the inforMation colleted inthe inforMation colleted in
the caSe iS calledthe caSe iS called datadata..
TypesofTypesof DATADATA
1. PriMary data.
2. Secondary data.
3. primaryprimary datadata &secondary&secondary datadata
When an inVeStigator collectS dataWhen an inVeStigator collectS data
hiMSelf With a definite Plan or deSignhiMSelf With a definite Plan or deSign
in hiS/her Mind, it iS calledin hiS/her Mind, it iS called PriMaryPriMary
datadata..
data Which are not originallydata Which are not originally
collected by the inVeStigator butcollected by the inVeStigator but
they are obtained froM PubliShed orthey are obtained froM PubliShed or
unPubliShed SourceS are KnoWn aSunPubliShed SourceS are KnoWn aS
Secondary data.Secondary data.
4. What isWhat is graphgraph ??????
a diagraM that ShoWS relationShiPS
betWeen nuMberS. graPhS arrange
nuMerical inforMation into a Picture
froM Which it iS often PoSSible to See
oVerall PatternS or trendS in the
inforMation iS called graPh.
5. TypesofTypesof graphgraph
There are Three Types of graphs:-
1. Bar graph.
2. DouBle Bar graph.
3. picTograph.
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Ajay
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6. What isWhat is bar graphbar graph ??????
• a Bar graph is a picTorial
represenTaTion of The numerical DaTa
By a numBer of Bars of uniform wiDTh
erecTeD horizonTally or verTically wiTh
equally spacing BeTween Them.
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7. Exampleof bar graph.Exampleof bar graph.
q. in a class of 30 pupils, The
maThemaTics Teacher creaTes The
TaBle Below ThaT gives The scores
The pupils geT in a TesT (The Teacher
scores The TesT from 0 To 20, anD all
The scores are whole numBers) Draw
a Bar graph ?
9. What isdoublebar graph.
A bAr grAph showing two sets of dAtA
simultAneously. it is useful for
compArison of dAtA.
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