The hypotheses I will be testing are -:
- As height increases, so does weight
- There is a link between the height and weight of Year 11 and Year 7 Boys and Girls
- Are there any other relationships between the height and weight between Year 7 and Year 11 students
I believe there will be a strong link between height and weight. I believe that the higher the height, the higher the weight.
This is because taller people are larger than smaller people and therefore weigh more.
Plan of Action – Data Collection
The data I have collected is that of Year 11 and Year 7 boys and girls. I will display the frequency for each height for both year groups.
I have chosen a random sample of 100 students in both year groups by selecting every other one student until I reached 100.
Using a large sample means that the data will be more useful and closer to the actual results for the whole amount of data.
I have chosen the Year 7 and Year 11 year groups because they are at the opposite age scale in a school and should show different results and how height and weight could change during 5 years.
I am going to put my information into tables because this will allow the information to be more easily viewed.
Whilst I collect my data, I will input it into a tally table and count the frequencies so it will be easier to calculate the data.
I will then record my results on diagrams, which I can then make statements and generalisations (about all of the students at Mayfield High) about.
Year 7 Girls
This graph shows that most girls are between 150 and 160.
Year 7 Boys
Year 11 Girls
Year 11 Boys
From my data, I can identify that most Year 7 boys and girls are between 150 and 160cm in height. The same is with Year 11 boys and girls, however there are several girls, which are between 160 and 180cm in height.
Boys in Year 11 are mostly between 160 and 190cm in height, with very few between 150 and 160cm, compared to Year 7 boys and girls and Y11 girls.
I will now compare the height of the pupils with their weight.
Year 7 Girls
The graph is evident that as the height increases, so does the weight of a person, which accords to my original hypothesis. There is one anomaly, however, where a student of 1.50 in height weighs 110.
Year 7 Boys
The graph is evident that as the height increases, so does the weight of a person, which accords to my original hypothesis. There is one anomaly, however, where a student of 1.64 in height weighs 140.
Year 11 Girls
The graph is evident that as the height increases, so does the weight of a person, which accords to my original hypothesis. It is evident that there are little (if any) anomalies.
Year 11 Boys
The graph is evident that as the height increases, so does the weight of a person, which accords to my original hypothesis. It is evident that there are little (if any) anomalies.
I will now compare the mode, median, mean and range of the height and weight.
Height
Weight