Confidence Interval

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The municipality of Amsterdam wants to estimate the average water retention capacity of the green roofs, by taking a simple random sample of size $30$ from the population. Simulate what happens in this case by taking a simple random sample from the variable capaciteit in the dataset V (groene daken). Use the seed: $99$ by applying the command set.seed(99) before running the sample() command.

What is the average of your sample?

$\bar{X} =$

$mm$

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