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Histograms 19 November, 2014

Histograms 19 November, 2014. A histogram is used instead of a bar chart when the bars have unequal width. This helps to give the graph a more realistic visual impression. Why is the bar chart misleading?. Fish Caught. Time (Hours).

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Histograms 19 November, 2014

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  1. Histograms19 November, 2014 A histogram is used instead of a bar chart when the bars have unequal width. This helps to give the graph a more realistic visual impression.

  2. Why is the bar chart misleading? Fish Caught Time (Hours)

  3. An angler keeps a record of the number of fish caught. The angler puts this information onto a bar chart.

  4. The areas of the bars give a false impression To avoid this problem a histogram is used Fish Caught Time (Hours)

  5. Frequency Density of Fish Caught Time (Hours)

  6. Frequency = Freq. Density x Class Width • Freq. Density = Frequency ÷ Width • Width = Frequency ÷ Freq. Density Here are the results for another angler’s fishing catch F W Calculate the frequency densities for the data in this table and draw a histogram for the data FD

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