Hypothesis: ' In general, Year 10 girls are heavier and taller than year seven girls ' I am also going to investigate whether there is any correlation between height and weight

Authors Avatar

Statistics Coursework,5/9/2007

GCSE Maths Coursework: Statistics Project

The aim of this piece of coursework is to investigate the following hypothesis: ‘ In general, Year 10 girls are heavier and taller than year seven girls ‘ I am also going to investigate whether there is any correlation between height and weight. I have collected information from a computerized database that was given to me by my teacher. I have chosen these sources of information because there is a large quantity of data, it is reliable secondary data, and is easy to find. I know this data is reliable as I have sifted through any anomalies and crossed them off.  

I have chosen to investigate a sample of 30 girls each year as it is large enough amount to get a fair result but small enough to manage.  To ensure that it is a fair sample, I have picked out 30 girls at random, from the year seven and 10 group, by using the ‘ran button’ on a calculator. I will use this sample of data to compare the heights and weights of the year seven and 10 girls and to see whether my hypothesis is correct.  

My chosen Data:

                            YEAR 7 GIRLS                      YEAR 10 GIRLS

Representing my Data

In order to see whether there is any correlation between the height and weight of each year, I have presented my data of height and weight for year on separate scatter diagrams.

YEAR 7 GIRLS

The scatter diagram shows that there is strong, positive correlation between the height and weight of year seven girls. This graph proves to me that the taller you are, the heavier you tend to be. This will be useful in this project for finding out whether my hypothesis is correct.

It seems to me that as girls grow older, they tend to get taller, meaning that they will probably become heavier. In this piece of coursework, I want to find out whether this is correct. I will do this by completing a number of graphs.

 

YEAR 10 GIRLS

Join now!

In comparison to the scatter diagram for the year seven girls, this graph shows that year 10 girls are generally taller. I can see this as the height of the year 10 girls starts at 1.4cm whereas the year seven girls start at 1.2 cm.

The scatter diagram above shows that there is strong positive correlation between the Height and Weight of Year 10 girls, illustrating that the taller you are the more heavy you tend to be.

The year tens are obviously, and are bound to be, taller than the year sevens as ...

This is a preview of the whole essay