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The aim of my investigation is to find out if the following hypothesis is true: Girls have a higher IQ than boys.

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Introduction

Plan The aim of my investigation is to find out if the following hypothesis is true: Girls have a higher IQ than boys. I was given a spreadsheet full of imformation about students from a made up school called Mayfield. The imformation included the children's eye and hair colour, their hight and weight, favourite tv program, music etc. The children were male and female and in years 10 and 11. There were 370 students altogether. I have decided to take a sample from the spreadsheet of 30 boys and 30 girls. First I will delete all the information I don't need from the spreadsheet, the only information I will leave is the students number, gender, IQ score. ...read more.

Middle

If for example my calculator brings up the number o.232 I will use the first number after the decimal place (2) and count up from the bottom e.g start at girl number one and move too places to girl 3. I will take number 3 at my sample . Then all I need to so is press = and the calculator will bring up another random number. If the calculator bring up 0.725 I will count up 7 places from number 3. My next sample would be number 10. I will repeat this 30 times to I have a sample of 30 girls. ...read more.

Conclusion

I will use them to draw a box and whisker diagram for each so I can compare IQ scores. The mean will help me back up my inter quartile range because the mean is the same as quartile 2. I will need to draw a box and whisker diagram to compare the range between the boys and girls IQ scores. I will also draw a scatter graph so I can look at the correlation between scores. I will also draw a scatter diagram so in can look at the different scores. Sometimes I might come across problems. One of my samples could be a misprint e.g someone with an IQ of 14 is probably a mistake on the spreadsheet. If this problem occurs I will ignore the sample and carry on. ...read more.

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