Statistic Form 2

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Statistics
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  • The Complete Idiot's Guide to Statistics, 2nd Edition (Idiot's Guides) --- http://amzn.to/1T2ZU7E
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Statistic Form 2

  1. 1. <ul><li>STATISTIC </li></ul><ul><li>A branch of Mathematics </li></ul><ul><li>A study about data including collecting ,recording </li></ul><ul><li>organizing, presenting, analyzing and interpreting it. </li></ul><ul><li>Help people in planning and making decision </li></ul>
  2. 2. <ul><li>Data </li></ul><ul><li>Data is a collection of information or facts </li></ul><ul><li>Example: Height of 1 AKIK </li></ul><ul><li>Weight of 2 DELIMA </li></ul><ul><li> Number of students in each class </li></ul><ul><li>Population of Malaysia </li></ul><ul><li>through 1990-2000 </li></ul><ul><li>Data can be collected by: </li></ul><ul><li>Counting </li></ul><ul><li>Measuring </li></ul>
  3. 3. <ul><li>COLLECTING DATA </li></ul><ul><li>The following data shows the height of 30 students in </li></ul><ul><li>3 Mawar measured in the nearest cm. </li></ul><ul><li>164 16 1 164 160 164 16 1 162 163 162 160 </li></ul><ul><li>160 164 163 162 163 162 160 162 164 164 </li></ul><ul><li>16 1 162 164 162 162 162 163 160 163 163 </li></ul><ul><li>Is this the most efficient way of displaying data? </li></ul><ul><li>How do we record the data more systematically? </li></ul><ul><li>USE FREQUENCY TABLE </li></ul>
  4. 4. FREQUENCY
  5. 5. Frequency Table 1 f 2 e 3 d 2 c 3 b 2 a Frequency Letters
  6. 6. <ul><li>What is the highest frequency? </li></ul><ul><li>What is the lowest frequency ? </li></ul><ul><li>Which height has the highest frequency? </li></ul><ul><li>Which height has the lowest frequency? </li></ul><ul><li>What is the different between the </li></ul><ul><li>highest frequency and the lowest </li></ul><ul><li>frequency </li></ul>7 //// // 164 6 //// // 163 9 //// /// 162 3 /// 161 5 //// 160 Frequency Tally Height
  7. 7. Vertical Frequency Table Horizontal Frequency Table Notice that: Total of frequency is the same as the data in the set. 7 164 30 Total 5 163 9 162 3 161 6 160 Frequency Height 7 5 9 3 6 Frequency 164 163 162 161 160 Height
  8. 8. Vertical frequency table Horizontal frequency table Voting for the monitor 1 9 2 6 3 Frequency Sulaiman Yusoff Yasmin Ibrahim Safura Candidates 1 Sulaiman 9 Yusoff 2 Yasmin 6 Ibrahim 3 Safura Frequency Candidates
  9. 9. RECORDING DATA ORGANIZING DATA REPRESENTING DATA
  10. 10. REPRESENTING DATA
  11. 11. PICTOGRAM BAR CHART LINE GRAPH
  12. 12. PICTOGRAM? Data representation in graphical form What is
  13. 13. <ul><li>Decide on the appropriate symbol to be used: </li></ul><ul><li>- SinceThe data is related with the number of pupils,. Therefore we can use the symbol as shown . </li></ul><ul><li>2.Then decide on how many pupil does this symbol represent. (scaling) </li></ul>Steps: How can we represent this data In graphical form? 2B: 30 =7 1 faces 4 2
  14. 14. Horizontal Pictogram
  15. 15. What is the total number of students in form 2?
  16. 16. Vertical Pictogram
  17. 17. <ul><li>REMINDER: </li></ul><ul><li>A pictogram must have a </li></ul><ul><li>title </li></ul><ul><li>-The title tell us what the </li></ul><ul><li>table is all about. </li></ul><ul><li>Legend to show </li></ul><ul><li>value represented by </li></ul><ul><li>one symbol </li></ul><ul><li>Use suitable symbol </li></ul>
  18. 18. represent 5 apples represent 4 pears Sales of Fruits on Particular Day 24 5 C 16 25 B 0 30 A Pear Apple Stall Stall C Stall B Stall A
  19. 19. represent 5 apples represent 4 pears Sales of Fruits on A Particular Day Stall C Stall B Stall A
  20. 20. BAR CHART HORIZONTAL BAR CHART VERTICAL BAR CHART <ul><li>A bar chart is a way of </li></ul><ul><li>representing the frequencies of data </li></ul><ul><li>obtained by counting </li></ul><ul><li>It displays a data using </li></ul><ul><li>a numbers of bar with the </li></ul><ul><li>same width. </li></ul><ul><li>Each bar represent different categories </li></ul><ul><li>The height of the bars </li></ul><ul><li>represent the frequencies. </li></ul><ul><li>Bar chart can be </li></ul><ul><li>represented horizontally or </li></ul><ul><li>Vertically </li></ul>
  21. 21. To construct a bar chart
  22. 22. <ul><li>To construct bar chart </li></ul><ul><li>We need to: </li></ul><ul><li>Write the title of the chart </li></ul><ul><li>Label the axes </li></ul><ul><li>Determine the scales for </li></ul><ul><li>the axes </li></ul><ul><li>4.Draw the bars </li></ul>Vertical bar chart
  23. 23. Horizontal bar chart
  24. 24. PROBLEM SOLVING INVOLVING BAR CHART
  25. 26. MISLEADING
  26. 28. BAR CHART WHICH CONTAINS 2 SETS OF DATA (DUAL BAR CHART)
  27. 29. The table shows the Yearly enrolment of SMK Baru from 2001- 2003.Construct a dual bar chart to display the Data . 600 700 2003 400 600 2002 500 650 2001 Boys Girls Year
  28. 30. Construct a dual bar chart to show the sales of the burgers 300 300 March 300 400 Feb 300 500 Jan Fish Chicken Month
  29. 31. LINE GRAPH Line graph is always used to represent the data over a period of time . For instance hours, weeks, months or years
  30. 32. A way of representing a set of data over a period of time 100 August 50 July 70 Jun 60 May 50 April 40 March 70 February Mark Month
  31. 36. <ul><li>Determine the suitable scale for the vertical </li></ul><ul><li>axis </li></ul><ul><li>2. Draw the axes and name them and </li></ul><ul><li>mark the value on it </li></ul><ul><li>3. Mark the horizontal axis </li></ul><ul><li>4. Plot the points </li></ul><ul><li>5. Draw the graph by joining the adjacent points </li></ul><ul><li>with straight line </li></ul><ul><li>6. Give the graph a title </li></ul><ul><li>REMINDER: The vertical axis always represent quantity </li></ul><ul><li>while the horizontal axis always represent </li></ul><ul><li>period/time. </li></ul>To construct line graph
  32. 37. REFER TO LESSON 110 LINE GRAPH (NO 4 )

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