Standard Error of Mean Difference

Problem

The standard error of the difference in independent means is sqrt(s1^2 / n1 + s2^2 / n2).

Given the two standard deviations and sample sizes, return the standard error.

Hint

Add variances of the two sample means under independence.

case 1

in: [1,25,1,25]

expected: 0.282842712474619

case 2

in: [2,10,3,10]

expected: 1.140175425099138

case 3

in: [0,5,4,4]

expected: 2

Starter codePython

def standard_error_of_mean_difference(s1, n1, s2, n2):
    # Your code here
    pass

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