I intend to investigate the relationship between height (M) and weight (Kg) in Mayfield High School.

The hypotheses that I have made are effective but simple. I expect to find that:

) Boys weigh more than girls

2) Girls are taller than boys in KS3

3) When I investigate the relationship between height and weight, I expect to find that

the taller you are, the heavier you weigh.

4) Gender may affect the results that I will have attained by the end of my investigation.

I possess a secondary source of data that I had obtained on a website www.edexcel.com which had been posted by the examination board. I have chosen to use a secondary source of data, as this data is easier to obtain than raw (primary) data. I am taking in to account that this is a secondary source of information; it could contain faults or could be in some sort of way corrupt. To acquire such raw data, I would have to perform a data research which could take a long period of time depending on the investigation, population size and many other factors.

The information that will be essential to collect for my investigation is height, weight, gender and year group. I will use a sample size of 7% of the population size, 1183 students, which calculates to be 83, rounded up to the nearest whole number. I had the option of selecting any sample size between 5% and 10%. Furthermore, I know that the bigger the sample the more useful the data will be, but I chose a small sample size because I believe that it will be easier to manage and to analyse.

The hypotheses that I have made are effective but simple. I expect to find that:

) Boys weigh more than girls

2) Girls are taller than boys in KS3

3) When I investigate the relationship between height and weight, I expect to find that

the taller you are, the heavier you weigh.

4) Gender may affect the results that I will have attained by the end of my investigation.

I possess a secondary source of data that I had obtained on a website www.edexcel.com which had been posted by the examination board. I have chosen to use a secondary source of data, as this data is easier to obtain than raw (primary) data. I am taking in to account that this is a secondary source of information; it could contain faults or could be in some sort of way corrupt. To acquire such raw data, I would have to perform a data research which could take a long period of time depending on the investigation, population size and many other factors.

The information that will be essential to collect for my investigation is height, weight, gender and year group. I will use a sample size of 7% of the population size, 1183 students, which calculates to be 83, rounded up to the nearest whole number. I had the option of selecting any sample size between 5% and 10%. Furthermore, I know that the bigger the sample the more useful the data will be, but I chose a small sample size because I believe that it will be easier to manage and to analyse.