Investigating the relationship between height and weight for the pupils in a secondary school.

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AS Level Statistics Project

Investigating the relationship between height and weight for the pupils in a secondary school


Table of Contents


Introduction

For this investigation, I am going to use data on secondary school pupils to find the distribution of the data and also to look for any meaningful relationships between the heights and weights of the students.  

When I was looking at the various things that I could study, one of the factors that I looked at was data collection.

The amount of data was large, spanning across different year groups.  I could have looked at the variation of weight and height with age and with gender, but this would have made the project too long and time-consuming.  I therefore concentrated on looking at the relationship between height and weight and comparing these for different sexes in year 9 only.

Primary Data by Direct Observation

This option would have given me the opportunity to write more about the problems of data collection and about possible sources of bias and problems in random sampling.

However, this method would have been very time-consuming and I may not have been able to collect enough data to demonstrate my ability at using a range of statistical techniques.

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Secondary Data

When I was researching into possible sources of data, I was told that data that had been collected about students at a secondary school was available.  When I looked at the data, I realised that there were enough observations for me to be ale to carry out a meaning investigation.  In particular, the data was available in raw format.  In other words, I did not need to worry about the data having been previously manipulated.


Hypotheses

1. Distribution

1.a. The distribution of the heights and the weights will be approximately normal

1.b. The spread of the girl’s ...

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