I will be collecting the following information which is provided for each pupil:
- Gender (boy/girl)
- Age
- Weight
- Height
- Year group
I will find this information from Edexcel examination database on Mayfield High School.
The reason for choosing this source of information is because it provides me with all the relevant data in number of categories for each pupil, which gives me a range of choices I can choose from and use in this project.
I know the data provided to me is reliable, because the data is gathered from a real life based school (Mayfield High School) and been given to me.
I will use a sample size of 7% of the total population (1183) of the school. 7% of the total population is equal to 83 pupils in total from year groups 7-11 with mixed genders. This sample size is suitable because it will give a closer idea of how the actual results will be for the whole school.
There are more students in year 7 than in year 11 which shows that students are not distributed equally in each year. This will make my sample biased and unfair. To make sure my sample is fair I will use Stratified sampling. I have 1183 students in total, and 7% of 1183 gives me a sample of 83 students. So I work out 7% of each year group which gives me a number of students I will be choosing from each year group.
I will use this data to compare the height and weight of students from all year groups with mixed genders, and I will also comparing age with height and weight as well.
Now I can get my random samples by pressing and multiply by 151 [The number of boys in year 7].
I will round the answer to the nearest whole number, and then repeat the same steps until I get 11 samples of boys in year 7. I will do the same calculation with the other year groups and girls group as well.
