Chapter 7
The Normal Curve

I. Normal Curve. . . . General

 II. z Scores

 III. Standard Normal Curve

 IV. z Scores and the Normal Curve
           
                        Mean of Z scores = 0
                        Standard Deviation of Z scores = 1
                        Proportion of Scores above the Mean = .5
                        Proportion of Scores below the Mean = .5            

A. Area Above

1. +z Score. . . . Look in Column 3.....Worked Problem

2. - z Score. . . . Column 2 + .5000.....Worked Problem

  B. Area Below

1. +z Score. . . . Column 2 + .5000.....Worked Problem

2. - z Score. . . . Look in Column 3.....Worked Problem

  C.  Visual Summary:  Finding Areas Under the Normal Curve

  D. Area Between

1. Same Sign. . . . Subtract Column 2 Values.....Worked Problem

2. Opposite Signs. . . . Add Column 2 Values.....Worked Problem

  E.  Visual Summary:  Finding the Area Between Two Z Scores

  F. Percentiles.....Worked Problem

1.Use Table P to find the z Score

2. Convert the z Score to a Raw Score

 

            G.  Visual Summary:  Finding Percentiles

Copyright © 2004 by Mark W. Vernoy