We are learning to: - Enhance our Mathematical learning skills. (Which Enterprise skills?) -Accurately construct stem and leaf diagrams and work out the mode, median and range. (Level 6) Always aim high! LESSON OBJECTIVES Creative Entreprene ur Responsibl e Citizen Independen t Learner Positive Thinker Team Worker Reflectiv e Learner Enterprise Skills Which ones are you using? AUTHOR Where are we in our journey? Real life cross/curric ular links? www.mistrymaths.co.uk
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We are learning to: - Enhance our Mathematical learning skills. (Which Enterprise skills?) -Accurately construct stem and leaf diagrams and work out the.
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We are learning to:- Enhance our Mathematical learning skills. (Which Enterprise skills?) -Accurately construct stem and leaf diagrams and work out the mode, median and range. (Level 6)
Enterprise Skills Which ones are you using?TASK 3 (LEVEL 6)
STEM AND LEAF DIAGRAMS
1)The pulse rates of 11 teachers are recorded. Below are the results:
71, 65, 7859,65, 74, 64,57,52,63, 60,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were over the pulse rate of 70?
2)The journey times, in minutes, for students on the school bus are shown below:
18, 21,33, 29,24, 28,
31, 30,32,
19,24,21,22,
2218
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction took half an hour or more?
Smallest = 5278Biggest = 5
67
2 7 903 4 5 514 8
Most common65
64
Biggest - Smallest78 - 5226
Three were more than 70
311
Smallest = 1833Biggest =
123
8 8 91 1 2 2 4 4 8 90 1 2 3
Most commonNo mode
24 minutes
Biggest - Smallest33 - 1815 minutes
Four were 30 or more 415
Key: 6I3 means 63 Key: 2I4 means 24
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?TASK 3 (LEVEL 6)
STEM AND LEAF DIAGRAMS
3)The number of lates to school in a week are shown below:
16, 26,25, 13,14, 30,
32, 25,25,
15,24,19,
8,11,
715,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were over 20 lates?
38
4)The number of e-mails received over 10 days are shown below:
23, 5, ,187, 27, 12,16,15, 12
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were less than 15?
Smallest = 738Biggest = 0
123
7 813 4 5 5 6 94 5 5 5 60 2 8
Most common25
19
Biggest - Smallest38 - 731
Eight were over 20 lates
817
Smallest = 527Biggest =
012
5 72 2 5 6 83 7
Most common12
15
Biggest - Smallest27 - 522
Four were under 15 e-mails
410
= 2 5
Key: 2I5 means 25 Key: 1I2 means 12
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?TASK 3 (LEVEL 6)
STEM AND LEAF DIAGRAMS
5)The number of text messages sent a week by 16 students is shown below:
6, 24,19, 16,17, 5,
16, 35,19,
22,14,27
32,16,
2323,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were less the 30 texts?
6)The ages of patients seen by a doctor on a particular day are shown below:
24, 27,58, 12,47, 51,
48, 39,49,
55,37,35
16,40,
4638,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were not adults?
,28,35
,56,39
Smallest = 535Biggest = 0
123
5 64 6 6 6 7 9 92 3 3 472 5
Most common16 texts
19 texts
Biggest - Smallest35 - 530
Fourteen were less than 30 texts
1416
= 7 8
Smallest = 1258Biggest = 1
2345
2 64 7 85 5 7 8 9 906 7 8 91 5 6 8
Most commonNo mode
39 texts
Biggest - Smallest58 - 1246
Two were children
220
= 1 10
Key: 3I2 means 32 Key: 5I5 means 55
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?EXTENSION 3 (LEVEL 6)
STEM AND LEAF DIAGRAMS
1)The heights (cm) of 11 students is shown below:
144, 126,
147,136, 145,152, 135,
158,
134,134,121,142141,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were less the 140cm?
2)The heights of plants (mm) in a greenhouse are shown below:
188, 164,165,172, 159,146, 168,
166,151,140,177,
163,
(a) Draw a stem and leaf diagram to represent this data.
(b) Work out the mode
(c) Work out the median
(d) Work out the range
(e) What fraction were more than 1.5m?
172, 154
Smallest = 121158Biggest = 12
131415
164 4 5 612 4 5 72 8
Most common134cm
141cm
Biggest - Smallest158 - 12137cm
Six were less than 140cm
611
Smallest = 140188Biggest = 14
15161718
0 614 934 5 6 82 2 78
Most common172mm
164.5mm
Biggest - Smallest188 - 14048mm
Twelve were more than 1.5m
1214
= 6 7
Key:14I1 means 141 Key: 18I1 means 181
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?EXTENSION 4 (LEVEL 6)
STEM AND LEAF DIAGRAMS
1)The back-to-back stem and leaf diagram below shows the Mathematics score for the same test for two different classes:
01234
7 92 3
93 3 6 6 9
0 1 1 2 5 84 6 65
6146013347122289003
Key: 3I2 means 32
Class A Class B
Compare the averages and range for both classes.
Class A Class B
Mode =
Median =32marks
27marks
Mean =19
Mean = 26.9marks (1d.p.)
Range = 43 - 6Range = 37marks
Mode = 13marksMedian = 19.5marks
Mean =20
Mean = 20.8marks (1d.p.)
Range = 45 - 7Range = 38marks
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?MINI-PLENARY (SPOT THE MISTAKES)
STEM AND LEAF DIAGRAMS
Find the mistakes below:1) 2)
Not ordered
Median = 3.1
Range = 5.3 – 1.4Range = 3.9cm
Mode = 3.6cm
DISCOVERY
LINK BACK TO OBJECTIVES
- Accurately construct stem and leaf diagrams and work out the mode, median and range.
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?
What level are we
working at?
Creative Entrepreneur
Responsible Citizen
Independent Learner
Positive Thinker
Team Worker
Reflective Learner
Enterprise Skills Which ones are you using?PLENARY ACTIVITY
STEM AND LEAF DIAGRAMS
The following are the results of the final 12 throws in the men’s and women’s javelin in the 2012 London Olympics. The distances are in metres.
83 85 86 82 87 82
88 82 88 79 76 93
73 65 65 67 52 66
66 53 53 60 72 65
Men
Women
Draw a stem and leaf diagram(s) and discuss your findings.
789
Men6 92 2 2 3 5 6 7 8 8
3
Women567
2 3 30 5 5 56 6 7
2 3
567
89
Women Men2330555667
23 6 92 2 2 3 5 6 7 8 8
3Mode = 82m Mode = 65m
Median = 84m Median =65mRange = 17m Range = 21m
Draw your brain
What have you learnt?
In your brain, write or draw everything you can remember about constructing stem and leaf diagrams and working out the mode, median and range. It can be a skill or a reflection, or something else that might be prominent in your brain.