P 3 interpreting data muddying the waters projector

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Interpreting Data: Muddying the Waters Projector Resources Exhibit 2: Riverside Manager’s Letter P-4 Dear Environmental Officer, Please find enclosed two charts. The scatter plot clearly shows that the increase in the concentration of the chemical in the river has caused a real drop-off in visitor numbers to the Center over the last year. The pie chart proves that people (not surprisingly) don t like the acrid smell of pollution wafting up from the river. The river needs to be cleaned up; it s not good for the environment and it s certainly not good for my business. Please let me know what action you intend to take. Yours faithfully, Manager, Riverside Center
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Interpreting Data: Muddying the Waters Projector Resources Scene 1: The Assistant DA’s Office P-5
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Interpreting Data: Muddying the Waters Projector Resources Scene 2: At the Factory P-6
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Interpreting Data: Muddying the Waters Projector Resources P-7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2008 2009 2010 Legal level for the chemical is 8 mg per cubic meter of river water. Chemical concentration in the river water in mg per cubic meter. Year Bar chart showing level of chemical concentration in the river water: Exhibit 3
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Interpreting Data: Muddying the Waters Projector Resources Exhibit 4 P-8 Survey of the number of birds seen next to the factory in one afternoon:
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Interpreting Data: Muddying the Waters Projector Resources Judge’s Instructions P-9 You have to reach a fair judgment about who wins the case. Read through the information carefully. Write notes on what you think the data and statistics show. Explain why you agree or disagree with the arguments, using math. Look critically at all of the information. Do not just accept what people say as fact .
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Interpreting Data: Muddying the Waters Projector Resources Exhibit 5 P-10 Survey of diseased fish near site A Both surveys covered a period of five days. Two years ago 6 fish out of 300 were diseased. Last week 64 fish out of 1,600 were diseased.
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Interpreting Data: Muddying the Waters Projector Resources Exhibit 6 P-11 Two years ago Now Site A 20 15 Site B 22 9 Site C 19 23 Site D 23 29 Survey of numbers of invertebrates:
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© 2015 MARS, Shell Center, University of Nottingham This material may be reproduced and distributed, without modification, for non-commercial purposes, under the Creative Commons License detailed at All other rights reserved. Please contact [email protected] if this license does not meet your needs. Mathematics Assessment Project Classroom Challenges These materials were designed and developed by the Shell Center Team at the Center for Research in Mathematical Education University of Nottingham, England: Malcolm Swan, Nichola Clarke, Clare Dawson, Sheila Evans, Colin Foster, and Marie Joubert with Hugh Burkhardt, Rita Crust, Andy Noyes, and Daniel Pead We are grateful to the many teachers and students, in the UK and the US, who took part in the classroom trials that played a critical role in developing these materials
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