Identifying a library function Suppose you have experimental data in a variable called and want to determine which value occurs most frequently. Look in the Python documentation for the statistics module and find a function that will help. Fill in the function name (no parentheses or parameters) below: statistics. Calling a library function If you need to determine how many ways there are to arrange a number of items, the (short for permutation) function can compute it for you. Read its documentation and use it to determine how many ways there are to arrange thirteen items selected from a set of fifteen