```
#'Function for calculating mean and rounding on three decimals
#'@param values A vector with values
#'@return The mean rounded on three decimals
mean = function(values){
#Checks if values are numeric and if the vector at least contains one value for
#denominator not being 0 later. No missing values allowed
assert(checkNumeric(values, any.missing = FALSE, min.len = 1))
round(sum(values)/length(values),3)
}
```

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