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  • Level: GCSE
  • Subject: Maths
  • Word count: 1800

Is there a correlation between a person's height and weight?

Extracts from this document...

Introduction

Is there a correlation between a person’s height and weight?

Aim

My aim is to investigate in to the correlation between a person’s weight and their height. The reason I wish to investigate height and weight is because this can help the cloths industry to find out the different size clothing that they would produce or order otherwise could result in excess supply. Basically the results from this investigation in to the correlation between a person’s weight and their height can be used to justify what size clothing would be best for sale at the store to increase sales, hence market share.

Data Collection

The method that was used to collect this data, which is illustrated on the next page, was by using a systematic sampling method. In which every third person seen was selected and their height and weight was measured. This data was collected from an all boy’s school, in the sixth form, aged between 16 and 18.

Overall I have 68 pairs of data available to me via the sample, which is enough for me to complete a successful investigation in to the correlation between a person’s height and weight.

Ensuring the Quality of Data

...read more.

Middle

168

79

33

168

80

34

168

81

35

168

80

36

168

82

37

168

82

38

168

80

39

169

82

40

169

76

41

169

73

42

169

85

43

169

82

44

170

83

45

170

83

N

Height (cm)

Weight (kg)

46

170

85

47

170

84

48

172

86

49

172

85

50

172

87

51

172

93

52

172

88

53

172

89

54

172

89

55

172

82

56

173

89

57

173

90

58

175

89

59

175

89

60

175

94

61

175

93

62

176

84

63

176

91

64

177

88

65

177

97

66

180

103

67

180

98

68

187

104


Modelling Procedures - The Scatter Diagram

image01.png

Modelling Procedures

For the data on the previous page I have drawn a scatter diagram and a line of best fit, passing through the points (mean of x, mean of y). The term of line of best fit is used to describe a

...read more.

Conclusion

The restrictions that had been imposed on me upon the data, was that the data was restricted to a single year group, the sixth form and was only made up of males, as the data was from an all boys school. I was unable to have the height and weights for a wider group of people

In addition another restriction was the degree of accuracy, as the measurements were taken to the nearest whole number I would have preferred a further degree of accuracy possibly to two decimal places, which would have meant the use of expensive equipment but would have further increased the degree of accuracy upon my findings.

Refinements

Possible refinements that I would have made to this investigation to improve the quality are if I could have been able to have collected data of both boys and girls and made a comparison, hence the clothing industry will be further benefited through more results.

A larger sample size would have been an ideal improvement as this would have allowed me to further investigate in to the height and weight correlation in more detail and further increase accuracy of my results.

Overall as a conclusion I have fulfilled my aim and have done so efficiently, with accurate results, overall the investigation is a success.

        - Page -

...read more.

This student written piece of work is one of many that can be found in our GCSE Height and Weight of Pupils and other Mayfield High School investigations section.

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