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Frequency Polygons
A Mark
1.
2.
3. frequency
Frequency
Draw the
Extend
in lines
straight
mid
distribution
Polygon
if
- points
necessary
lines
canof
connecting
be
can
each
drawn
½be
a class
shown
baronto
points.
at
interval
using
the
an existing
top
a beyond
frequency
withhistogram.
a first
point.
polygon.
and last bars
Test Scores
20
15
Frequency
10
5
0 5-9 10-14 15-19 20-24 25-30
Marks…read more

Slide 3

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Frequency Polygons
Time Taken for Race
20
15
Frequency
10
5
0 10 20 30 40 50 60
Time in minutes…read more

Slide 4

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Frequency Polygons
Maximum Daily Temperature
as Recorded by a Gardener
20
15
Frequency
10
5
0 10 15 20 25 30 35
Temperature oC…read more

Slide 5

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Frequency Polygons
Worksheet 1…read more

Slide 6

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A frequency polygon can be drawn directly from the frequency table by
finding the mid-point of each class interval.
Marks 5­9 10 ­ 14 15 ­ 19 20 ­ 24 25 - 30
frequency 4 10 20 13 8
Test Scores
20
22
12
15
17 27.5
Frequency
10 7
5
0 5-9 10-14 15-19 20-24 25-30
Marks…read more

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