presentation of data
- 2. IN THIS WE WILL KNOW ABOUT- 1. Diagrammatic presentation Bar diagram Multiple bar diagram Percentage bar diagram Pie diagram 2. Frequency diagram Histogram Ogive
- 3. WHAT IS BAR DIAGRAM? Bar diagram are those diagram in which data are presented in the form of bars or rectangle.
- 4. FEATURES OF BAR DIAGRAM Breath remains the same. Bar are at equal distance. All bars have common base line. These can be presented either in ascending or descending order. Bar may be either vertical or horizontal.
- 5. TYPES OF BAR DIAGRAM- Simple bar diagrams- Simple bar diagram are those diagram which are based on a single set of numerical data.
- 6. Year 1951-60 1961-70 1971-80 1981-90 1991-2000 2001-2010 Birth rate 45 35 30 28 24 20 0 5 10 15 20 25 30 35 40 45 50 Birth rate 1951-60 1961-70 1971-80 1981-90 1991-2000 2001-2010
- 7. HORIZONTAL BAR DIAGRAM 0 50 100 150 200 250 300 350 marks E D C B A
- 8. MULTIPLE BAR DIAGRAM Multiple bar diagram are those diagram which shows two or more sets of data simultaneously.
- 9. 0 5 10 15 20 25 30 35 40 45 50 1921-30 1921-30 1921-30 1921-30 1921-30 1921-30 birth rate Death rate
- 10. PERCENTAGE BAR DIAGRAM Percentage bar diagram are those diagram which shows simultaneously, different parts of the values of a set of data in terns of percentage.
- 12. PIE DIAGRAM SECTORS %share Primary 18.2 Secondary 23 Transport 27.8 Finance 17.5 Social Service 13.5
- 14. FREQUENCY CURVES A frequency curve is a curve which is plotted by joining the mid-points of all tops of a histogram by free hand smoothed curves.
- 16. OGIVE OR CUMULATIVE FREQUENCY CURVE Ogive is a curve which is constructed by plotting cumulative frequency data on the graph paper in the form of a smooth curve.