Stem and Leaf Diagrams Stem and leaf diagrams

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Stem and Leaf Diagrams Stem and leaf diagrams are a pictorial way of showing

Stem and Leaf Diagrams Stem and leaf diagrams are a pictorial way of showing statistics The important parts of a stem and leaf diagram are The Title The stem The leaves in order starting from the stem The number of items The key n = 20 Class Maths Marks 1 0 2 2 6 8 2 3 4 9 5 9 3 0 0 2 6 8 9 9 4 0 4 5 2 / 3 means a mark of 23

A group of students measured their pulse rates in beats per minute. The results

A group of students measured their pulse rates in beats per minute. The results were. 66 69 62 58 74 56 67 72 61 62 59 60 72 58 63 Draw a Stem and Leaf diagram to show this We need a title Pulse rates (beats per minute) 5 86689889 We need the stems We need the Leaves 6 6091227213260739 7 422224 We need to reorder the leaves We need to write in n We need the key n = 15 6 / 2 means 62 beats per minute

A group of students were asked how much pocket money they get. The results

A group of students were asked how much pocket money they get. The results were. £ 6. 60 £ 6. 90 £ 6. 20 £ 5. 80 £ 7. 40 £ 5. 60 £ 6. 70 £ 7. 20 £ 6. 10 £ 6. 20 £ 5. 90 £ 6. 00 £ 7. 20 £ 5. 80 £ 6. 30 Draw a Stem and Leaf diagram to show this Pocket money Note this gives us the same diagram as the previous example. This shows the importance of the title and key. 5 6 8 8 9 6 0 1 2 2 3 6 7 9 7 2 2 4 n = 15 6 / 2 means £ 6. 20

Draw Stem and Leaf Diagrams for the following sets of data Speed in mph

Draw Stem and Leaf Diagrams for the following sets of data Speed in mph The speed of cars, in mph, passing police speed check 3 2 4 5 6 7 8 9 35 46 32 48 53 58 60 39 36 48 34 51 42 37 53 42 51 38 1 1 3 3 8 4 2 2 6 8 8 6 0 n = 18 4/3 means 43 mph Distance in metres John took a note of how far, in metres, he was able to hit a golf ball 10 1 5 8 108 115 132 121 101 122 138 127 105 112 118 127 129 120 139 136 131 121 111 129 137 12 0 1 1 2 7 7 9 9 11 1 2 5 8 13 1 2 6 7 8 9 n = 21 12/3 means 123 m

Stem and Leaf diagrams can be used to compare 2 sets of data. To

Stem and Leaf diagrams can be used to compare 2 sets of data. To do this we draw a back to back stem and leaf diagram. Maths marks for class 1 A 8 0 Maths marks for class 1 B 6 8 9 8 5 3 1 1 2 2 2 5 5 8 9 4 4 5 2 0 0 1 1 6 7 6 4 3 1 1 0 3 3 7 7 7 3 3 4 1 n = 19 3/2 means a mark of 32 n = 20 How many students in 1 A had a mark of 31? 2 How many students in 1 B had a mark of 12? 3 1 A Which class appears to be best at Maths?

Use the Back to Back Stem and Leaf Diagram to answer the questions Books

Use the Back to Back Stem and Leaf Diagram to answer the questions Books borrowed from the library This week Last week 2 0 1 4 1 3 1 5 6 7 4 4 3 4 0 4 5 1 0 5 2 4 1 6 3 n = 10 2/0 represents 20 books How many books were borrowed at level 3 this week 65 ? How many books were borrowed at level 4 last week ? 129 Which week was best for the library How many books were borrowed last week altogether This ? week ? 387