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Subject: Statistics Created by: Jianru Shi Revised: 3/2/2017 Using the Standard Normal Table There are two types of standard normal tables. Before attempting to find either the z-‐score or the probability on the table, make sure you know which table you are using. The Cumulative Probability Table Each entry in the cumulative probability table is the probability of a random variable (x) is less than or equal to a specified value (z), which is illustrated in the graph as the shaded area from the value z to the left. The Normal Curve Area Table Each entry in the normal curve area table is the probability of a random variable (x) is between 0 and the special value z, which is illustrated in the graph as the shaded area from the 0 to value z. Subject: Statistics Created by: Jianru Shi Revised: 3/2/2017 Using the Standard Normal Table Steps Practice Find the probability given z-‐score using both tables: z = -1 p (x<=-1) = _______ p (x>=-1) = _______ z = 1 p (x<=1)= _______ p (x>=1)= _______ -‐-‐ References: The following works were referred to during the creation of this handout: Arnold, B. C., Balakrishnan, N., & Nagaraja, H. N. (2008). A first course in order statistics. Society for Industrial and Applied Mathematics. Subject: Statistics Created by: Jianru Shi Revised: 3/2/2017 Using the Standard Normal Table Cumulative Probability Table Subject: Statistics Created by: Jianru Shi Revised: 3/2/2017 Using the Standard Normal Table Normal Curve Areas Table -‐-‐ References: The following works were referred to during the creation of this handout: The University of Florida Statistics Department.