One Sample Z Statistic from Mean

Problem

For known standard deviation sigma, the one-sample z statistic is (xbar - mu0) / (sigma / sqrt(n)).

Given the sample mean, the hypothesized mean, sigma, and n, return the z statistic.

Hint

Standardize the difference by the standard error of the mean.

case 1

in: [5.5,5,1,25]

expected: 2.5

case 2

in: [0,1,2,4]

expected: -1

case 3

in: [10,10,3,9]

expected: 0

Starter codePython

def one_sample_z_statistic_from_mean(xbar, mu0, sigma, n):
    # Your code here
    pass

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