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Maths Coursework Hypothesis One - " The taller you are the heavier you are." To attempt to prove the above theory, a random stratified sample of sixty pupils across all the year groups. I stratified my sample, as there are uneven numbers in each year. I then generated random numbers using a calculator to choose the students. This is to eliminate bias and have a sample representative of the entire population. Once this sample had been chosen I calculated the mean mode and median for weight and height. I then drew a scatter graph for the data to show any relationship in the data between height and weight. I then calculated the Pearson Product Moment Correlation Co-efficient (PMCC) to see whether there was adequate correlation to draw a trend line. Choosing the Sample These values represent how many Year 7- 282 pupils 282/1183 x 60=14 of that year group are needed in ...

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