1. Stem and leaf diagrams

2. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range stem leaf 3456734567 Completion times

3. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

4. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7171 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

5. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 731731 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

6. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 3 1 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

7. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 3 1 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median, and range Completion times

8. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 3 1 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

9. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 3 1 8 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

10. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 3 1 8 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

11. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 3 1 8 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

12. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 3 7 1 8 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

13. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 3 7 1 8 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

14. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 3 7 4 1 8 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

15. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 3 7 4 1 8 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

16. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 3 7 4 1 8 3 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

17. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 3 7 4 1 8 3 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

18. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 3 7 4 1 8 3 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

19. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 3 7 4 8 1 8 3 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

20. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 3 7 4 8 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

21. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 5 3 7 4 8 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

22. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 5 4 3 7 4 8 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

23. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 5 4 3 3 7 4 8 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

24. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 5 4 3 3 7 4 8 1 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

25. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 7 3 6 6 8 8 1 9 2 5 4 3 5 3 7 4 8 1 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

26. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 3 7 4 8 1 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

27. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 3 7 4 8 1 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

28. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 4 8 1 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

29. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 4 8 1 2 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

30. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 3 7 4 8 1 2 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

31. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range Completion times

32. Example - drawing a stem and leaf Answer (a):- (1) key: 4|7 means 47 (2) put values into preliminary diagram: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 Question:- 29 students were set a simple task. Their completion times to the nearest second were: 47 61 53 43 46 46 68 48 72 57 48 54 41 63 49 42 58 65 45 44 43 51 45 38 46 44 52 43 47 (a) set these data into a stem and leaf diagram (b) find the median and range (3) re draw diagram with leafs in numerical order: Completion times

33. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 Completion times

34. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 Completion times

35. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8181 Completion times

36. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 Completion times

37. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 Completion times

38. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 Completion times

39. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 Completion times

40. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 Completion times

41. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 Completion times

42. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 Completion times

43. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 Completion times

44. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 Completion times

45. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 Completion times

46. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 Completion times

47. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 Completion times

48. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 Completion times

49. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 Completion times

50. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 Completion times

51. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 Completion times

52. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 Completion times

53. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 Completion times

54. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 Completion times

55. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 Completion times

56. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 Completion times

57. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 Completion times

58. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 Completion times

59. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 Completion times

60. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 5 Completion times

61. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 5 8 Completion times

62. Example - drawing a stem and leaf Answer (a):- (3) re draw diagram with leafs in numerical order: 3456734567 8 7 3 6 6 8 8 1 9 2 5 4 3 5 6 4 3 7 3 7 4 8 1 2 1 8 3 5 2 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 5 8 2 4|7 means 47 Don’t forget the key Completion times

63. Example - drawing a stem and leaf Answer (b):- 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 5 8 2 Completion times The median is the middle value: 15 th Median = 47 4|7 means 47 i.e. 15 th value There are 29 values

64. Example - drawing a stem and leaf Answer (b):- 3456734567 8 1 2 3 3 3 4 4 5 5 6 6 6 7 7 8 8 9 1 2 3 4 7 8 1 3 5 8 2 Completion times Lowest Range = Highest - Lowest 4|7 means 47 Highest Range = 72 – 38 = 34

65. Practice Question The manager at a garage recorded the times to mend punctures. The times were: 22 19 34 18 23 21 47 33 29 33 32 20 32 17 29 22 30 41 33 14 Complete a stem and leaf diagram for this data. Remember to include a key Find: a) the range of times b) the median time