Let z1 be a z-score that is unknown but identifiable by position and area. If the symmetrical area between -z1 and + z1 is 0.9544, the value of z1 is 2.0.

Question

Quizplus · Accepted Answer

This is true. In a standard normal distribution, the area between -2.0 and 2.0 is 0.9544, as given in the question. This means that the z-score corresponding to the 2.5th percentile is -2.0, and the z-score corresponding to the 97.5th percentile is +2.0.

Let Z1 Be a Z-Score That Is Unknown but Identifiable