Chap 16 Data Handling: Histograms - How does it look like?

Key questions:
  1. What is a Histogram?
  2. How different is it from a Bar Chart?
click here to find your answers.

1. What is a Histogram?














Frequency Table and Histogram














source: http://quarknet.fnal.gov/toolkits/new/histograms.html

2. How different is it from a Bar Chart?
click here to find your answers.
source: courtesy of Ms Loh KY

4 comments:

  1. 2.How is a histogram different from a bar chart?

    -The width of each bar in a bar chart must be the same but the width of a bar in the histogram need not be the same.

    -The area in a histogram represents the data but the height is used to represent data in a bar graph

    -There must be gaps between the bars in the bar chart but no gaps are needed to be between bars in a histogram

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  2. 2. How different is it from a Bar Chart?

    - In a Histogram, the area of the histogram is the amount of data. In a Bar Chart, the height of the bar chart is the amount of data.

    - In a Histogram, the width of the histogram can be different. In a Bar Chart, the width of it must be the same.

    - In a Histogram, there are no gaps in between the bars. In a Bar Chart, there are gaps between the bars.

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  3. 2. There are no gaps between the bars and the histogram is made up of vertical and horizontal axis. The verticle axis is always the "Frequency" and the horizontal axis is a series of numbers, either discrete or range. The numbers run in ascending order. We would usually be asked to find out the trend of a histogram, and be asked to compare the bar graph.

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  4. 2. There are no spaces between the bars of a histogram, but there are spaces between the bars of a bar graph.

    Normally, we would be asked to find the trend of the histogram, whereas, we would be asked to compare for the bar graph.
    The vertical axis of a histogram is always "Frequency", but for the bar graph, it could be anything.

    The horizontal axis of the histogram is a series of numbers - either discrete (i.e. 2, 3, 4, ...) or range (of equal class intervals) (i.e. 20<x<=30, 30<x<40), but for the bar graph, it could be anything.

    The width of the bars of a histogram could be of different sizes, whereas, the bars of the bar graph must be of the same size.

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