Gaussian Q-Function

Problem

Return the Gaussian Q-function, the tail probability of a standard normal variable:

Q(x) = 0.5 * erfc(x / sqrt(2))

Hint

By symmetry Q(-x) = 1 - Q(x).

case 1

in: [0]

expected: 0.5

case 2

in: [1]

expected: 0.15865525393145705

case 3

in: [2]

expected: 0.022750131948179216

case 4

in: [-1]

expected: 0.8413447460685429

Starter codePython

import math
def gaussian_q(x):
    # Your code here
    pass

4 test cases · run your code against them in the editor