I created a function that consumes a list of values and produces the average. However it only works when I use integer values. I get the following error when I make the values into floats:

min() arg is an empty sequence

What's wrong here. If it works for integers, why not floats. How do I fix this?

As the error suggests, you passing in an empty sequence to you min call. What that means is if for example you have an elem_list and are calling min(elem_list), the list is currently empty [] and is erroring. Whatever your calling min on is currently empty.