histogram


Definition of Histogram

  • A histogram is a bar graph that shows how frequently data occur within certain ranges or intervals. The height of each bar gives the frequency in the respective interval.

Examples of Histogram

  • The histogram shown below gives the number of children visited a particular zoo.

Solved Example on Histogram

  • The discounts offered by a super market are as shown in the table. Which of these histograms is the correct representation of the data? 

    Amount (in $)

    Discount%

    1,000 - 1,999

    2

    2,000 - 2,999

    4

    3,000 - 3,999

    6

    4,000 - 4,999

    8

    5,000 - 5,999

    10

     

                                                                   

    Choices:
    A. Figure 1
    B. Figure 2
    C. Figure 3
    D. Figure 4
    Correct Answer: A
    Solution:
    Step 1: The heights of the bars in the histogram indicates the discount offered (in %) for the corresponding amount (in $).
    Step 2: Observe the graphs to match the heights of the bars in each graph with the values in the table.
    Step 3: It can be observed that the heights of the bars in Figure 1 matches with the values in the table.
    Step 4: So, Figure1 is the correct representation of the data.

    Related Terms for Histogram

    • Bar graph
    • Frequency
    • Interval
    • Data