Frequency Polygon

How do you construct a frequency polygon?

• Start at bottom left hand corner of first column and draw a straight line through the top right hand corner of each column

• Start at origin and draw a straight line through the centre of each column

• Start at centre of column and draw a straight line through the left hand corner of the next column.

• Start at origin and draw a straight line through the right hand corner of each column

The horizontal axis of a frequency polygon comes from this column:

• Class width

• Frequency

• Midpoint

• Class Endpoints

• Class Boundaries

The vertical axis of a frequency polygon comes from this column:

• class width

• frequency

• class midpoint

• class boundaries

Use the frequency polygon to identify the class with the greatest frequency.

• 20.5 - 23.5

• 29.5 - 32.5

• 35.5 - 38.5

Complete the definition:

• class boundaries

• lower class limits

• upper lass limits

• midpoints

How many people visited the cinema twice?

• 28

• 20

• 25

• 30

The horizontal axis of a frequency polgyon comes from this column:

• Class

• Frequency

• Midpoint

• Cumulative Frequency

• Class Endpoints

Which of these is used for the horizontal axis of a frequency polygon?

• Class Width

• Frequency

• Midpoint

• Upper Boundary

State the upper limit of the second class interval.

• 5.5

• 6

• 10

• 10.5

Find the cumulative frequencies.

• 28, 56, 84, 100

• 28, 58, 70, 72, 74, 76

• 33%, 37%, 20%, 7%, 7%, 7%

• 28, 30, 12, 2, 2, 2