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© Boardworks Ltd 2010 1 of 14 Evaluating Information.

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Presentation on theme: "© Boardworks Ltd 2010 1 of 14 Evaluating Information."— Presentation transcript:

1 © Boardworks Ltd 2010 1 of 14 Evaluating Information

2 © Boardworks Ltd 2010 2 of 14 Teacher’s notes included in the Notes Page Flash activity. These activities are not editable. Web addresses Icons key: For more detailed instructions, see the Getting Started presentation Functional Skills check Student task accompanies this slide Printable activity This lesson will cover: Information and bias. Using secondary sources in an appropriate manner. Using spreadsheets to analyse and evaluate data.

3 © Boardworks Ltd 2010 3 of 14 Using different sources Information often varies depending on where it is obtained. It was a shocking game, full of terrible refereeing decisions, dirty challenges, and the first goal was clearly offside. One of the best games I’ve ever seen. Free- flowing football, tense, exciting. Just amazing! Which of these sources of information do you think is most reliable?

4 © Boardworks Ltd 2010 4 of 14 Validity of sources When collecting information from the Web, you will be expected to evaluate the materials and assess the validity of the information. You should find out: What is the website address? Who has written the information? What is the purpose of the information? Is the website biased or trying to sell a product? Is the information still relevant? When was the website created? Can it be verified by another source? Does the information only give one point of view or does it highlight other opinions?

5 © Boardworks Ltd 2010 5 of 14 Crediting sources

6 © Boardworks Ltd 2010 6 of 14 What can you remember?

7 © Boardworks Ltd 2010 7 of 14 Testing data Once you have recorded your data, you should also test it to see how reliable it is. Before you start analysing your results, go through your data and see if you can spot any potential bias or flaws in the sample. It will be easier to correct these flaws at this stage before you start creating graphs and writing reports. If you have ended up with only males responding to your survey, then you will have an unreliable sample (unless you only intended to survey men).

8 © Boardworks Ltd 2010 8 of 14 Using spreadsheets Once you have data from primary or secondary sources, you can use a spreadsheet to record your results. This has several advantages: you can set up formulae to count up the answers to each question you can easily create graphs to display your answers you can copy and paste formulae between columns analysis of data becomes a lot easier.

9 © Boardworks Ltd 2010 9 of 14 Spreadsheet functions for analysis

10 © Boardworks Ltd 2010 10 of 14 Finding percentages To find the percentage of male responses you could count up all the data and use a calculator. Or you could use one formula to find the number of responses and then use another formula to find the number of males. You can then divide the two and multiply by 100 to give you the percentage of males. The advantage of using a formula is that you can continue to input responses and the formula will update data automatically.

11 © Boardworks Ltd 2010 11 of 14 Graph types

12 © Boardworks Ltd 2010 12 of 14 Adding trendlines Once a chart has been created in a spreadsheet, you can add a trendline which can be used in forecasting future trends. To do this you simply select the chart and then click Add Trendline in the Chart menu. What are the potential inaccuracies of trendlines?

13 © Boardworks Ltd 2010 13 of 14 Analyse and interpret charts and graphs

14 © Boardworks Ltd 2010 14 of 14 True or false

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