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I am finding the Relationship between Height and weight. My hypothesis is that the taller you are the more you weigh.

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Introduction

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I am finding the Relationship between Height and weight. My hypothesis is that the taller you are the more you weigh, There could be boys or girls in year 7 that are tall that makes them look older, or boys or girls in year 11 might be small that makes them look younger. So my hypothesis will not be perfect. I have got information from all key stage 3 and key stage 4 students. Each pupil data has different information that is not relevant e.g. hair colour, eye colour, left/right hand, favourite sport, favourite type of music etc. To prove if my hypothesis is right or wrong, I will have to do a survey. To make my survey a fair survey I will have to take a fair number of each sex, I am not going to make or rely my Hypothesis to become true, so I should not make my survey a bias survey. I would not be able to use information from each pupil in each year, so I will have to find a method to break it down, so it easier for me to do a survey, so I will find 2.5% from the females in year 7 and den 2.

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Middle

I have got all my information all from key stage 3 and 4 students.

        I will record and present my data on a scatter graph which I will use weight and height data to transfer on to a scatter graph and I will comment on the trend, line of best fit and comment on the correlation but also the patterns on the graph.

Year Group

Number of boys

Number of girls

Total

     7

151

131

282

     8

145

125

270

     9

118

143

261

    10

106

94

200

    11

84

86

170

                                   604                              579                              1183

2.5% of each boys and girls in each year is(rounded up):

Year 7-Boys:4

            Girls:3        

Year 8-Boys:4

            Girls:3

Year 9-Boys:3

            Girls:4

Year 10-Boys:3

              Girls:2

Year 11-Boys:2

              Girls:2

What to do:

1: Set up the problem:
aim
Hypothesis- You may have more than one… related the same line of enquiry

Explain how you collect you data.

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Conclusion

               My results was very useful as I have already mentioned using my scatter graphs as my main factor proving that my hypothesis was right but also I knew my experiment wasn’t perfect but If I had to do it again I would add more hypothesis to see if it is really true the relation between height and weight. In order also to make my work more accurate I will use more accurate numbers and also different sampling methods to see if then if my hypothesis comes out correct but also I will use the column of how they travel and how long is it from school to home because this factor could change figures around because if students were short and weighed a lot an travelled to school by car that means they get no exercise so which could change the aspect about relating height to weight because if they get too much or too little exercise it coluld al change the figures which could make a difference which I will have to investigate next time to improve my work but overly done well but also I have said what I can do next time to improve it.

...read more.

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