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  • Level: GCSE
  • Subject: Maths
  • Essay length: 2291 words

I am investigating to find a relationship between ks2 results and IQ in children and to determine whether there is a significant difference between boys and girl's ks2 results and IQ.

Extracts from this essay...

Introduction

The Data Handling Project Introduction I am investigating to find a relationship between ks2 results and IQ in children and to determine whether there is a significant difference between boys and girl's ks2 results and IQ. My hypothesis is that there is a relationship between IQ and ks2 results, this means that is if a person's ks2 result is high their IQ should also be high. My second hypothesis is that there is a difference between boys and girls intelligence. I intend to do this by comparing them in stem and leaf diagrams, box and whisker diagrams and scatter diagrams. By doing this it will help me support my hypothesis. I will investigate this theory by taking a sample from the Mayfield High School database. I have chosen this source because it will save me the time going to get the data. This means that the data is secondary so it could be biased so I will discard any information I believe to be unreliable because if the data is strongly biased and out off the correlation of the rest of my data it will affect my results. From this, I will extract 100 random people, 50 girls and 50 boys this is because we need an equal number so that we can compare them to each other.

Middle

Also to confirm whether there is a relationship between a person's IQ and ks2 results. These diagrams will help me show a relationship between IQ and Ks2 results and the relationship between boys and girls. As a result of these calculations and diagrams I will be able to compare the ks2 results and IQ in children and to see whether there is a relationship between boys and girls. I will use Spearman's coefficient of rank correlation to show how strong the correlation is between boy's ks2 results and IQ, girl's ks2 results and IQ and the whole sample of ks2 results and IQ. Interpretation My calculations will help me to investigate whether there is a relationship between ks2 results and IQ in children and to discover whether there is a significant difference between boys and girls. This will help me suggest my hypothesis is true, which is that there is a relationship between IQ and ks2 result and there is a difference in intelligence between boys and girls. The girls ks2 results are evenly spread this shows that within the inter-quartile range it is an even spread, for the boys is positively skewed which means that most of the results within the inter-quartile range are higher than the median.

Conclusion

My findings could not prove my hypothesis because the data is secondary also it is fictional this means that it could be biased. I could improve this by collecting my own data. I took a sample of the whole data so this sample could not represent all of the data fully. We only used data from one school this means it is a not very good spread of the all the people who has ks2 results and an IQ score. There are practical consequences due to the scatter diagrams because you could use the line of best fit to predict what IQ they have if they have their Ks2 results. For examples if a girl moved a school the new school would want to know what ks2 results but if she only has her IQ, they could look on the scatter diagram for girls IQ score and ks2 and look on the line of best fit to predict her ks2 results. I could further this investigation to make it more accurate by expanding the investigation, I could take a bigger sample size or used more than one sample, you could even use the whole school. You could investigate into gender comparisons over different ages to investigate back to back how the girls and boys intelligence differs. BY Adam Downes

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