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In this investigation, I intend to find out whether there is a relationship in height and weight in students, and how this relationship changes between girls and boys, with age.
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CONTENTS 1. INTRODUCTION.............................................................................................................2 Hypothesis................................................................................................................2 Plan...............................................................................................................................3 Data Collection........................................................................................................3 Scatter Graphs.......................................................................................................5 Spearman's Rank Correlation Coefficient...................................................6 Box and Whisker Diagrams................................................................................7 Stem and Leaf Plots.............................................................................................7 Body Mass Index...................................................................................................8 Mean, Median, Mode and Interquartile Range..........................................8 2. RESULTS...............................................................................................................................9 3. ANALYSIS.........................................................................................................................25 Anomalies................................................................................................................27 4. CONCLUSION.................................................................................................................29 5. EVALUATION.................................................................................................................30 6. APPENDIX 1 - Stratified Sample Calculation...................................................31 7. APPENDIX 2 - Tables of Data.................................................................................33 8. APPENDIX 3 - Spearman's Rank Calculations....................................................43 INTRODUCTION In this investigation, I intend to find out whether there is a relationship in height and weight in students, and how this relationship changes between girls and boys, with age. I have chosen to investigate the relationship between the height and the weight as I think that the height and the weight are the only two categories that will give a clear correlation. If I was to investigate the relationship of two other categories, like the eye colour and the IQ, I believe that however interesting and amusing the results would be, they would not provide too clear a relationship, or any conclusive information. The data provided...
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