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1. WEL COME TO MY MATHEMATICS FA-4
2. Some commonly used diagrams to represent numerical data are:
Pictographs Bar graph Double bar graph Pie-diagrams or
Pie-charts
3. The information collected in all such cases is called
data
4. Pictographs represent data through appropriate pictures. In
pictographs, the same type of symbol or picture is used to
represent the data. Each symbol is used to represent a certain
value, and this is mentioned clearly in the graph Pictographs
5. A display of information using bars of uniform width, their
heights A bar graph:
6. A bar graph showing two sets of data simultaneously.
7. Grouped data can be presented using histogram. Histogram is
a type of bar diagram, where the class intervals are shown on the
horizontal axis and the heights of the bars show the frequency of
the class interval. Also, there is no gap between the bars as there
is no gap between the class intervals.
8. Histogram
9. The data regarding choice of subjects showed the occurrence
of each of the entries several times
10. Circle Graph or Pie Chart These are called circle graphs.A
circle graph shows the relationship between a whole and its parts.
Here, the whole circle is divided into sectors. The size of each
sector is proportional to the activity or information it
represents
11. Its representation in a pie diagram is as shown