Histograms For Students

Introduction :

                Histograms are bar graphs that give the frequency data occur within particular range or interval. Histograms that symbolize the frequency distribution by means of rectangles in which class intervals represented by width of a rectangle and frequencies are directly proportional to area of rectangle which known by students. Frequency distribution is a tabular collection of data viewing how many interpretation lie above, or below records. The values of each bar give frequencies in individual interval.


Details about Histogram for Students:


                A range of the Histograms equally separates all possible values in a data set of groups or classes. For every group of four-sided figure, students can constructed with a base length that is identical to the collection of values in that definite group, and an area directly proportional to the number of observations decreasing into that group.

                Histograms show a visual demonstration so students can see where most of the measurements are located. Students you must know the collections of group of data called classes, and same the context of a histogram called as bins.

                The height of a four-sided figure, which is the same to the frequency density of the interval, i.e. the frequency, should split by the breadth of the interval. Student can give the data values for the frequency and can plot the Histogram points. The total region of the histogram that exactly is identical to the number of data.

                The running total of frequencies or Simply the Cumulative frequency is the running total of class frequencies in the histograms.


Construction of Histogram for students:


   Step 1:   Calculate the quantity of data

   Step 2:   Review on a register page

   Step 3:   Calculate the range of the data

   Step 4:   Find the number of intervals in the data

   Step 5:   Calculate interval width

   Step 6:   Identify interval of initial points

   Step 7:   Calculate number of data in each interval

   Step 8:   Plot the data

   Step 9: Add designation and data


Example on histogram for students


Construct a Histogram for the following Data



                     -6 to -4


                     -4 to -2


                     -2 to 0


                      0 to 2


                      2 to 4


                      4 to 6



    Histogram Graph for Students:

                         Histogram example

                   i) Plot a points of coordinates such as (-6,-4),(-4,-2),(-2,0),(0,2),(2,4),(4,6) and the related frequency can be identified and make the points.

                   ii) Take x -axis 1 cm = 2 units, y -axis 1cm = 1 unit.

                   iii) The Horizontal axis represents the number line, which displays the data in equal interval. The vertical axis represents the frequency of each bar.