Not sure how to implement the standard deviation through recursion

Question

So I have the generic method set up consisting of:

• A parameter of type T
• A List of T\'s (which will be the data set that I will be looking at)
• A

Answer 1

You don't need recursion. This could be computed using foldLeft:

elements.foldLeft(0) {
   case (accumulator, item) => ...//calculate here next value from previously calculated 
                                  //value (accumulator) and current item
}