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Language Development

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Submitted By cherub14
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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 gives information about 1183 girls and boys at
Mayfield High School, who have been categorized into their year groups. These year groups begin with the students entering their teens, and end in their mid-teenage years.

In order to be able to compare girls and boys in each year, I will represent the distribution of heights and weights for both sexes in each year in various forms. I plan to use stem and leaf plots, scatter graphs and box plots, and a wide range of calculated data, like the mean of the heights and weights, their interquartile range and their
Body Mass Index.

The data that will be represented will not be all the data provided, as if I were to do this, then I would be plotting 2366 datum points which would be ideal, however time does not allow for this number of points. So, instead I will take a stratified sample of the total data and use this sample in the investigation.

From these representations of the data, conclusions will be drawn as to how the relationship between height and weight changes with age and sex, but before this is done, any anomalous data points will be considered, so that they do not affect the overall conclusions.

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