1. Warm up Find the mean, median and mode: Create an example of a biased survey question and a non biased survey question.

2. Bar Graphs and Histograms

3. Bar Graph

4. Double Bar Graph

5. Histogram

6. Bar Graphs A visual representation of data Require labels on the horizontal and vertical axis Values go on vertical axis Use the range of values to determine scale Items go on horizontal axis

7. Example In the 1990’s, four space shuttles were used for various missions. The number of missions taken by each shuttle during this time are shown in the table. Create a Bar Graph to show your data. ShuttleMissions Atlantis16 Columbia18 Discovery17 Endeavour13 What should My scale be?

8. ShuttleMissions Atlantis16 Columbia18 Discovery17 Endeavour13 Shuttle Missions

9. Using the chart How could we find The mean number of Books read over the summer?

10. Double Bar Graph Same as a single, except it compares two items. Requires a key

11. This is a table showing the number of students who play a sport. SportBoysGirls Soccer 109 Basketball 1512 Track and field 810 Volleyball 516 What goes on the horizontal axis? What goes on the vertical axis?

12. Create a rough sketch of this data in a double bar graph SportBoysGirls Soccer 109 Basketball 1512 Track and field 810 Volleyball 516

13. Sport # of students

14. Histogram Different than bar graphs Used to show change in intervals (1-5, 6-10, 11-15) Interval goes on the horizontal axis Must use equal intervals

16. Frequency Table To help organize data and determine interval Look at data and choose intervals of equal size that will cover all of the data. (look for the largest and smallest value and make an educated judgement) Count the amount of numbers that fall into the interval. That is your frequency.

17. Constructing a Frequency Table The number of named stars in a group of 34 constellations are listed below. Make a frequency table of the data. 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 1, 15, 9, 1 What is the smallest and what is the largest number? The interval must be equal, what should use?

18. IntervalTallyFrequency 0-3 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 1, 15, 9, 1

19. IntervalTallyFrequency 0-3 4-7 8-11 12-15 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 1, 15, 9, 1

20. IntervalTallyFrequency 0-3 4-7 8-11 12-15 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 1, 15, 9, 1

21. IntervalTallyFrequency 0-314 4-79 8-117 12-154 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 1, 15, 9, 1

22. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

23. When do you use A bar graph? A double bar graph? A histogram?

24. Closure Using your data from the pizza survey create a bar graph, a double bar graph, and a histogram. You may work with your partner but must create your own graphs with your own data. Remember to use labels and keys

25. Bar Graph

26. Double Bar Graph Sport # of students

27. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

28. Bar Graph

29. Double Bar Graph Sport # of students

30. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

31. Bar Graph

32. Double Bar Graph Sport # of students

33. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

34. Bar Graph

35. Double Bar Graph Sport # of students

36. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

37. Bar Graph

38. Double Bar Graph Sport # of students

39. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations

40. Bar Graph

41. Double Bar Graph Sport # of students

42. 0-34-78-1112-15 Number of Stars Frequency Number of Stars in 34 Constellations