The Relationship between Height and Weight of Boys and Girls

The Relationship between Height and Weight of Boys and Girls

Recently due to the media and the government the weight of children

has been discussed. It is believed that children are now becoming

obese and are now more overweight than children in the past. This had

led to public becoming worried about the health of the future

generation because there is currently an increase in the number of

coronary heart diseases, which are linked to obesity and lavish

lifestyle.

Consequently, I have decided to investigate the state of children’s

health in today’s schools. In order to do this, I must explore whether

the height of children has increased, and whether it would result in

an increase in weight. However, it is necessary to explore the

differences between boys and girls to allow me to reach a beneficial

conclusion to this investigation.

My investigation will delve into the following areas.

· Who are taller, boys or girls?

· Is height a dependent variable for the weight?

· How much does weight vary with age?

My first hypothesis is that I believe that boys are taller than girls.

My justifi

I believe that boys are taller than girls

For me to prove this hypothesis right or wrong I have been given some

data, which originates from Mayfield Secondary School. I have decided

to choose this hypothesis because I am aware of the fact the data

cannot be skewed because the school is open to all students and

children are not selected on the basis of physical ability or

intelligence.

order to pursue this hypothesis I first removed irrelevant columns of

data so I could focus on the ones being discussed, while at the same

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... middle of paper ...

...ake predictions based on the

overall trend using the correlation coefficient, which is the gradient

of the line.

[IMAGE]

This graph shows a relatively clear positive correlation between

Height and Weight. As height increases, generally, so does height,

although at a moderate rate.

The equation of the line of best fit is:

y = 43.03x-18.47

This equation reveals a number of important facts about the

correlation of my data:

The coefficient of x; the gradient of the line, shows that for every

metre of height gained, statistically, height will increase by 43.03

kg.

I will apply this equation to the weight data, which will create an

alternative set of heights. I will then compare these statistically

calculated heights to the true heights in order to determine the

reliability of the equation: