Aim: How do we construct a cumulative frequency table/histogram?

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Aim: How do we construct a cumulative frequency table/histogram?

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Aim: How do we construct a cumulative frequency table/histogram?

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Aim: How do we construct a cumulative frequency table/histogram?

- Construct a Frequency table (intervals)
- Extend the Table to include a cumulative frequency column
- The C. Freq. Column is calculated by starting from the bottom and adding each Freq. to the C. Frequency recorded on the previous row.

200

150

90

30

10

- Construct a Cumulative Frequency table
- Draw/Label the Horizontal Axis (intervals)
- Draw/Label the Vertical Axis “Cumulative Frequency”
- Graph the Bars (No Gaps)
- Last bar should contain the total frequency
- Title the Graph …..The words
“cumulative frequency” should appear in the

title.

- Label the horizontal axis with the appropriate intervals.
- Name the axis ……Test scores
- If the Intervals do not begin at 0 use a “break” symbol on the axis

51-60 51-70 51-80 51-90 51-100

Test Scores (Intervals)

- Begin at zero
- Number the Vertical Axis.
- Label the axis “Cumulative Frequency”

150

100

50

0

Cumulative Frequency

Test Scores(Interval)

51-60 51-70 51-80 51-90 51-100

51-60 51-70 51-80 51-90 51-100