the inforMation colleted in
the caSe iS called data.
Types of DATA
1. PriMary data.
2. Secondary data.
primary data & secondary data
When an inVeStigator collectS data
hiMSelf With a definite Plan or deSign
in hiS/her Mind, it iS called PriMary
data Which are not originally
collected by the inVeStigator but
they are obtained froM PubliShed or
unPubliShed SourceS are KnoWn aS
What is graph ???
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.
Types of graph
There are Three Types of graphs:1. Bar graph.
2. DouBle Bar graph.
What is bar graph ???
represenTaTion of The numerical DaTa
By a numBer of Bars of uniform wiDTh
erecTeD horizonTally or verTically wiTh
equally spacing BeTween Them.
Example of 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 ?