repeat.qmd

# Repetition

The function `replicate(nrep, expression)` repeats the `expression` provided `nrep` times.

For example, `replicate(10, mean(rnorm(100)))` reads: 'Draw 100 values from a normal distribution with a mean of 0 and a standard deviation of 1 (the default values of `rnorm(n, mean, sd)`), calculate the mean of these 100 values, and do all that 10 times.'
  
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**YOUR TURN:**  
In your local exercise script:  
1. Repeat 1000 times the calculation of the mean of 10 values drawn from a uniform distribution between 0 and 10.  
2. Repeat 100 times the calculation of the mean of 50 values drawn from a normal distribution with a mean of 10 and a standard deviation of 5.  
3. Make a histogram of your results for each task. Are the distributions looking as expected?  

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