Growth Percentile

Problem

Return the percentile of a normally distributed score: 100 * Phi((score - mean)/sd). Return 0.0 when sd <= 0.

Hint

Use the normal CDF through math.erf.

case 1

in: [100,100,15]

expected: 50

case 2

in: [115,100,15]

expected: 84.1344746068543

case 3

in: [85,100,15]

expected: 15.865525393145708

case 4

in: [130,100,15]

expected: 97.72498680518208

case 5

in: [100,100,0]

expected: 0

Starter codePython

import math
def growth_percentile(score, mean, sd):
    # Your code here
    pass

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