1 99:59:59,999 --> 99:59:59,999 in the last video, we started to explore 2 99:59:59,999 --> 99:59:59,999 the notion of an error function 3 99:59:59,999 --> 99:59:59,999 no to be confused with expected value 4 99:59:59,999 --> 99:59:59,999 because it really does look like the same notation