1. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam WFM 5201: Data Management and Statistical Analysis Akm Saiful Islam Lecture-5: Data Exploration April, 2008 Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET)

2. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Data Exploration through Graphical Means Bar diagram Pie chart Histogram Stem and Leaf Plot Frequency Plot Scatter diagram Line graph

3. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Bar Diagram Vertical Bar Diagram Horizontal Bar Diagram Component Bar Diagram Multiple Bar Diagram

4. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Vertical Bar Diagram ResponseFrequencyRelative frequency Frequently490.327 Occasionally710.473 Rarely240.160 Never60.040

5. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Horizontal bar diagram

6. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Component Bar Diagram Region Population in '000Percent of population MaleFemaleMaleFemale A112281063751.348.7 B176341630652.048.0

7. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Multiple bar diagram

8. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Pie Chat 2D Pie Chart3D Pie Chart

9. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Histogram

10. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Frequency Polygon Expen.No. 4.5-9.5 8 9.5-14.5 29 14.5-19.5 27 19.5-24.5 12 24.5-29.5 4 Total 80

11. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Scattered Diagram Husband's age Wife's ageHusband's age Wife's ageHusband's age Wife's age 19 26 27 29 36 40 35 15 17 19 21 28 36 32 39 26 33 39 25 40 32 30 19 27 34 21 38 21 26 28 29 37 31 - 14 19 21 29 27 -

12. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Scattered Diagram

13. WFM 5201: Data Management and Statistical Analysis © Dr. Akm Saiful IslamDr. Akm Saiful Islam Line Diagram YearPopulation 190128.9 191131.6 192133.2 193135.6 194142.0 195144.2 196155.2 197476.4 198189.9 1991111.5