Sho't left to data science

Tag: statistics

  • Populations and samples

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    shotlefttodatascience
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    Populations We can think of the population as the complete set of “things”, whatever the “things” are that are under consideration – for example if we’re interested in studying the height of men in South Africa, then the population would be all adult men in South Africa. A population can be described by parameters. Here’s…

  • Central limit theorem – a worked example

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    shotlefttodatascience
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    Remember our formal definition: The CLT states that, provided enough samples are taken, the sample distribution of the sample mean will be normally distributed, regardless of the population distribution. In mathematical terms we say therefore that the sample mean is equal to the population mean: With enough samples this also happens – the sample standard deviation…