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# Aim: How do we construct a cumulative frequency table/histogram? PowerPoint PPT Presentation

Aim: How do we construct a cumulative frequency table/histogram?. To create a Cumulative Frequency Table we must:. Construct a Frequency table (intervals) Extend the Table to include a cumulative frequency column

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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?

### To create a Cumulative Frequency Table we must:

• 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

### To create a Cumulative Frequency Histogram:

• 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.

### Horizontal axis (left to right)

• 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)

### Vertical Axis (up and down)

• Begin at zero

• Number the Vertical Axis.

• Label the axis “Cumulative Frequency”

150

100

50

0

Cumulative Frequency

Test Scores(Interval)

### Graph it….(no gaps= no gaps)

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

### Graph it….(no gaps= no gaps)

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