A researcher obtained M = 27 for a sample of n = 36 scores selected from a population with µ = 30 and s = 18.This sample mean corresponds to a z-score of z = -1.00.

Question

Quizplus · Accepted Answer

To find the z-score, we use the formula:

z = (x - µ) / (s / √n)

Substituting the given values, we get:

-1 = (27 - 30) / (18 / √36)

Simplifying this equation gives us:

-1 = -3 / 3

Therefore, the z-score is -1, which is consistent with the given information. So, the answer is A.

A Researcher Obtained M = 27 for a Sample of N