1. AYLESBURY VALE ACADEMY Data Handling Extended Project

2. AVA Year Group No. of Boys No. of Girls Total 7150 300 8145125270 9120140260 10100 200 118486170 Total Students = 1200

3. AVA The data contains information on the following: Age Year Group IQ Weight Height Hair Colour Eye Colour Shoe Size Distance to School Travel to School No of siblings KS2 results KS3 results

4. AVA Variation in Eye or Hair Colour Distance from school and method of travel Height and Weight IQ and exam results KS 2 and KS 3 results Your own choice! What to Study?

5. AVA What do we expect?

6. AVA Structured Work Clear Diagrams Accurate Calculations Reasons and Explanations

7. Structured Work Introduction Question/Hypothesis Sampling Display Data Comparisons Correlation Conclusions

8. Clear Diagrams Grade D/C Pie Chart, Scatter Graph with line of best fit, Frequency Polygon, Stem-and-leaf diagram Grade B Cumulative Frequency Box & Whisker Grade A/A* Histograms, Stratified sampling Don’t forget labels and titles on all graphs!

9. Accurate Calculations Check all calculations carefully! Computer calculations are allowed and would be a GREAT way to check your own answers!

10. Reasons and Explanations Before - WHY ? are you doing something? do you expect something? After - WHAT? does that show? does that mean?

11. AVA How is it marked?

12. AVA 1.Specify the problem and plan 2.Collect, process and represent data 3.Interpret and discuss results There are the rules for marking: 8 marks are available on each section

13. Specify the Problem and Plan 1 or 2 marks: Grade E very simple problem, well defined aims, sensible data, uses only one feature of the data (e.g. eye colour) 3 or 4 marks: Grade D routine problem, quantitative data, good description, still only one feature of the data (e.g. IQ) 5 or 6 marks: Grade C/B substantial problem, 2 way data (e.g. height & weight), reasons and description, considers outliers 7 or 8 marks: Grade A/A* Complex problem, reasons, predictions, full explanations

14. 1 or 2 marks: Grade E any sample, tally charts, bar/pie charts 3 or 4 marks: Grade D any sample, average/range, dual bar charts, scatter graph 5 or 6 marks: Grade C/B random sample, box & whiskers, lines of best fit, equations of lines of best fit, cumulative frequency diagrams 7 or 8 marks: Grade A/A* Stratified sample, histograms, non-linear scatter diagrams, IQR, percentiles, standard deviation, correlation measures (Spearmans rank correlation) Collect, process and represent data

15. 1 or 2 marks: Grade E simple comments, ordered data 3 or 4 marks: Grade D Comments on average/range Comment on correlation 5 or 6 marks: Grade C/B Comments on all graphs, comparisons and contrasts, comments on outliers 7 or 8 marks: Grade A/A* Full comparisons on all diagrams, full argument/reasoning for why something may be true, full discussion of data sampling. Interpret and discuss results