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In this investigation my aim is to find the mean height of boys and girls in year 10.
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In this investigation my aim is to find the mean height of boys and girls in year 10. I also want to find the variance and standard deviation of the girls and boys height. I also want to find 90%, 95% and 99% confidence intervals of the girls and boys mean height. If the sample size is large enough, the distribution of the sample mean is approximately Normal. The variance of the distribution of the sample mean is equal to the variance of the sample mean divided by the sample size. These are true whatever the distribution of the parent population. The Central Limit Theorem allows predictions to be made about the distribution of the sample mean without any knowledge of the distribution of the parent population, as long as the sample is large enough. For this reason, the sample size will be set at 30, which I consider large...
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