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- Mr Kim

Drawing Frequency Histogram Polygon

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- Mr Kim

Score, x Frequency, f

0 4

1 3

2 7

3 3

4 12

Score, x Frequency, f

0 4

1 3

2 7

3 3

4 12

This is a Frequency

Table

Score freq

0 4

1 3

2 7

3 3

4 12

Score freq

0 4

1 3

2 7

3 3

4 12

Here’s our grid to fill in the values

Score freq

0 4

1 3

2 7

3 3

4 12 x

All the Scores go on the Horizontal axis

Score freq

0 4

1 3

2 7

3 3

4 12 x

Score freq

0 4

1 3

2 7

3 3

4 12 0 x

Score freq

0 4

1 3

2 7

3 3

4 12 0 x

Notice how 0 starts here

Score freq

0 4

1 3

2 7

3 3

4 12 0 x

Not here

Score freq

0 4

1 3

2 7

3 3

4 12 0 x

Score freq

0 4

1 3

2 7

3 3

4 12 10 x

Score freq

0 4

1 3

2 7

3 3

4 12 10 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 20 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 20 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 30 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 30 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40 x

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40 x

fAll the Frequencyvalues go on the

Vertical axis

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

x

f

Start from 0 and go up by 2 units until you reach …

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

x

f

Start from 0 and go up by 2 units until you reach 12

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12

Now start plotting the Histogram

1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12

There must be half unit gap

1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

3 is in between 2 and 4

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

3 is in between 2 and 4

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12

That’s Histogram complete. Let’s start the Polygon now

1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Start by plotting a dot in the corner

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

The dots are placed in the middle of each histogram

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Place the last dot at the bottom of the next unit

Score freq

0 4

1 3

2 7

3 3

4 12

Now, join them up using straight lines

1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

Score freq

0 4

1 3

2 7

3 3

4 12 1 2 3 40

0

2

4

6

8

10

12

x

f

And this is how you draw a Frequency Histogram Polygon!