Your Online Center of  Excellence For Mastering Change in the 21st Century


Coming soon

Participate in a wiki site on

"Change Management and Systems"

Home ] Phase 1 - Excellent Management ] PM Support ] BA Support ] Applied Stats Support ] Phase 2 - Strategy ] Phase 3 - Drivers of Change ] Phase 4 - Systems Engineering ] Phase 5 - Change Management ] About_Us.htm ]


Site Map


Business Concepts


The 5 Phases of Mastering Change


Westbrook Stevens Linked Business Models

Symptom Checker

Research Links

Problem Solving Tools


The WBS Assistant


Phase 1

Phase 1

Excellent Management

Step 1 - Leadership


Vision & Mission
Situational Leadership
Christian Leadership


Step 2 - Culture


Lifelong Learning


Diverse Culture

Written Communications
Gung Ho Culture
Conflict Management

Conflict Resolution

Building Relationships

Step 3 - Customer Focus


Step 4 - Team Building

Step 5 - Problems Solving


Business Analyst

Business Intelligence

Configuration Management

Flow Charts
Force Field
Genba Kanri

Project Management

Portfolio Management


Root Cause
Selection Tools

Statistical Tools



Step 6 - Continuous Improvement

Step 7 - Performance Measures



Project Goals by Process

Project Management

Empowerment Layers

Problems Solving

 1 to 1 Selection Tool

Flow Charts

Phase 2



Phase 2

Storms of Chaos


Step 1 - Waves

Forecasting Trends


Step 2 - Lightning

Managing Risks

Step 3 - Buoyancy

Building Relationships

Step 4 - The Storm

Winning Competition


Step 5 - The Ship

Leading Your Ship


Phase 3



Phase 3

Drivers of Change


Step 1 - External Environment

Step 2 - Building People

Human Resources

Step 3 - Organizational Structure

Step 4 - Internal Environment

Step 5 - Systems Thinking


Employee Retention

Future Organization

Phase 4



Phase 4

Systems Loops


Open System


Phase 5



Phase 3

3 Phases of Change


Step 1 - Before the Change

Step 2 - During the Change

Step 3 - After the Change




Material from:

  • W. J. Conover, Practical Nonparametric Statistics 2nd ed, 1980, John Wiley and Sons, Inc.
  • Examples from:  Bowerman, Bruce L., Richard T. O'Connell, Business Statistics in Practice, 3rd edition, 2003, McGraw-Hill Companies, Inc. 

The Sign Test: A Hypothesis Test about the Median

  1. Sign test is valid for any sample size and population shape
  2. May use when Population is Highly Skewed to right of left (Use Median)
  3. May use when If Sample size is small and population is highly skewed or clearly non-mound-shaped (not normally distributed)

Example 15.1 Compact Disc Player Lifetimes (From our book)

Step 1: Design Experiment and Collect Data

Step 2: Stem and Leaf (in thousands) shows us it is highly skewed data and median is best measure.


     2    0 09

    2    1

    3    2 1

    3    3

    4    4 8

    5    5 8

   (7)   6 0245689

    8    7 01245678


Step 3: Convert to (+) or (-) counts

Step 4:  Record Givens

(+'s) = T 

(-'s) = #

N = Grand Total

P = 1/2 (always for testing large samples)

n = # of (+'s) and (-'s)

Ties Don't Count

alpha = assume .05 unless given

In this problem we are looking for the  median lifetime of CD players that exceed 6000.  

Step 5: Decide on Hypotheses Test

  1. Two-tailed test Ho: p(+) = p(-)
  2. One-Tailed Test Ho: p(+) <= p(-)
  3. One-Tailed Test Ho: p(+) >= p(-)

The Sign Test for a Population Median

S = the number of sample measurements (less/greater) than M0, 

x to be a binomial random variable with n = 20, p = 0.5. 

We can reject H0: Md = M0 at the alpha level of significance (probability of Type I error equal to ?) if and only if the appropriate p-value is less than ?.

The Large Sample Sign Test for a Population Median

If the sample size n is large (n >= 10), we can reject H0: Md = M0 at the alpha level of significance (probability of Type I error equal to alpha) if and only if the appropriate rejection point condition holds or, equivalently, if the corresponding p-value is less than alpha.

Step 6: Using a software package (MiniTab or Excel) Solve

Sign test of median = 6000 versus  >  6000
            N  Below  Equal  Above         P   Median
LifeTime   20      5      0     15    0.0207     6757

Excel Spreadsheet for Sign Test

Step 7:  Use the Binomial Probability or z Tables

Sponsors and Services

Microsoft Partner Service and Products


MS Partner Services

MS Products Discounts



Training/Consulting  Support


Successful Change


Project Management

PMP Training

Basic PM

Advanced PM

PMO Development

PM Support


Business Analysis

BA Basics


Strategic Planning

Configuration Management

Value Engineering Change Management

Future Organizations

Risk Management

Audit Support


Managing Stress while in the Storms of Chaos


Excellent Management

The Workshop


Building Leaders

Supervisor Skills

Project Management


Employee Retention

Customer Service


Problem Solving


Statistics (SQC)


Process Improvement

Performance Measures


Business Planning

OD Support




Industrial Engineering

Systems Engineering


Soft Skills


Stress Management

Body Language

Building Teams

Communication Conflict

Controlling Anger

First Impressions

Interpersonal Skills

Listening Skills




Training and Facilitation

Recent Workshops


Finding Investments


Grants Management




Connecting Investment Capital With Entrepreneurs and Sound Businesses


Business Art


Home of the

"B. Stone" Artists

from the

Geronimo Stone Series



Craig A. Stevens


Student Support


Classy Photos
UoP Students
Trevecca Students


Finding Investments


Grants Management




Connecting Investment Capital With Entrepreneurs and Sound Businesses


Interesting Projects



Water Hyacinth Project - Mission: Turn the Aquatic Weeds Problem into a Blessing.


email Craig Stevens

 for a password.


Faith-Based Support


Faith-Based Technical Assistance Center



Book 1

Book 2

Theresa Heflin

Love Letters From God


Books & POD Casts

 Coming Soon by WBS


WBS Books

and Materials



Geronimo Stone,

His Music, His Love, and  the Mobile of Excellent Management.




Buy Paperback

Buy Hardcover

Free Ebook



7 Attributes of Excellent Management Workshop



Geronimo Stone,

Vol 2,

The Storms of Chaos



"...and another thing!"  


Need Help Staying Awake During Work or Classes?




Because of Popular Demand

Here is Where you Can Get Craig's Energy Drinks


Healthy Chocolates



For Your Own


Business Call

Irene at

(615) 300-8531



Send Questions (or Good Answers) to  Copyrights 2001-9.  Contact: Craig A. Stevens (COO) (615) 834-8838 

Westbrook Stevens, LLC, a Woman Owned Small Business.


Innovative Resources and Systems, a Service Disabled Veteran Owned Small Business. 


Our goal is for all we do to be Christ-centered and consistent with Judeo-Christian values.


"Guard against the impostures of pretended patriotism."

George Washington, Farewell Address, September 19, 1796