The Relationship Between Height and Weight for the Pupils in a Secondary School

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The Relationship Between Height and Weight for the Pupils in a Secondary School

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.

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 heights will be more than the boys'.

2. Comparative

--------------

2.a. On average, the boys will be heavier than the girls

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