Question

The symbol of the probability under the tail of Gaussian pdf is called as

(a) Complementary error function

(b) Co error function

(c) Complementary error & Co error function

(d) None of the mentioned

This question was addressed to me in semester exam.

This is a very interesting question from Intersymbol Interference-2 topic in portion Baseband Demodulation and Detection of Digital Communications

Answer 1

Right choice is (c) Complementary error & Co error function

For explanation I would say: The co error function or complementary error function is a commonly used symbol for probability under the tail of Gaussian pdf.