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I aim to find out if there is a link between the height and weight of children. I also aim to find if boys are heavier than girls on average, or even the other way around.

Extracts from this document...

Introduction

01/03/02        Kharunigan        L4Nc

AMS        Jayanantham        SET 1

Aim

I aim to find out if there is a link between the height and weight of children. I also aim to find if boys are heavier than girls on average, or even the other way around. I would also like to find out if the same applies with their heights as well. If there were differences in height and weight for boys and girls then I would like to find out if the differences change over the different year groups. For example, the girls may weigh more than the boys (on average) in year 7, but when you look at year 11 the boys become the heavier. (NB. The above statement was used just as an example to help explain a point, and was not based on any facts)

Hypothesis

I will find the answer to my questions by looking at the height and weight of the students attending Mayfield High School. I will do this by taking a sample from them, study the data and then compare them.

        The sample size I have chosen to take is 60 children. There are a total of 1183 students, and I believe that 60 would be a suitable sample size as it an amount that is not too large nor too small.

...read more.

Middle

Average Height

Year

Boys

SD

Girls

SD

7

1.545m

0.094m(3d.p)

1.607m(3d.p)

0.057m(3d.p)

8

1.513m(3d.p)

0.099m(3d.p)

1.6m

0.061m(3d.p)

9

1.62m

0.091m(3d.p)

1.554m(3d.p)

0.209m(3d.p)

10

1.718m(3d.p)

0.065m(3d.p)

1.62m

0.106m(3d.p)

11

1.705m

0.121m(3d.p)

1.623m(3d.p)

0.073m(3d.p)

Average Weight

Year

Boys

SD

Girls

SD

7

42.5kg

8.930kg(3d.p)

44.143kg(3d.p)

7.080kg(3d.p)

8

41.714kg(3d.p)

8.

...read more.

Conclusion

Year 10

The boys are taller and weigh more than the girls. This time the reason can be put down to the fact that the boys have gone on a growth spurt. The boys also have a much tighter distribution of height and weight than any of the other younger year groups. For the second time the girls have become lighter than the previous year group. I think that this could be happening as (no offence to any this may apply to) it is common for girls of that age to be very conscious about their weight, and to go on diets to try and lose weight, and in many cases they lose more weight than necessary and become underweight.

Year 11

The boys are still taller and heavier, but they haven’t grown, and neither have the girls. This is the case even thought the average height and weight went down for the boys and the average height and weight has increased for the girls. This is because the changes were very subtle and are highly likely to have been caused because of individual differences. But on the overall I can say that the boys and girls probably reached their maximum height and would grow no more for the rest of their lives. I cannot however say anything about the weight as it is easily changeable unlike height.

...read more.

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