Measuring Usability
Quantitative Usability, Statistics & Six Sigma by Jeff Sauro

zScore Package

Download both a 51 page tutorial and calculator on using and interpreting all questions related to z-scores.
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    $29.99     Now :  

If you will be making copies or distributing the product, please purchase the site license

Features & Benefits

Includes both the popular Z-Crash Course & zScore Calculator in one discounted package.
  • 7 Excel calculators for finding area for data-points and for means using z-scores
  • Calculates the area under the normal curve (both 1-tailed and 2-tailed) and z-scores with a real time updating graph in Excel (very cool!)
  • 51 pages of illustrated explanations, exercises, answers and FAQ's to help anyone understand z-scores

Who Should Buy

  • For complete newbies: This package assumes no prior statistics knowledge and provides an approachable and complete way of mastering z-scores in 11 lessons.
  • For anyone wanting an easy and quick review of z-scores and an easy to use calculator with 7 different functions for finding z-scores.


Contents of the Course & Calculator

Course Contents


Measuring the Center of Data (Mean)
Measuring the Variability of Data (Standard Deviation)
Range
Mean Absolute Deviation (MAD)
Variance & Standard Deviation
The Normal Distribution
The Empirical Rule
Normal Scores (Z-Score)
Percentile Scores
Area under the Normal Curve
Using Software
Using Tables
Area Above & Below a Point
Area below a Point
Area above a Point
Area Between
Converting Z-Scores back to Raw Scores
Z-Scores for Sample Means
Standard Error
Sample Means Vary Less than Raw Values
Some Frequently Asked Questions
Answers to Quick Reviews
Z-Score to Percentile Rank Table
Percentile to Z-Score Table
About the Author

Calculator Contents


Z-Score to Percentage
Percentage to Z-score
Area Between Two Z-scores
Z-Score from Data-Point (e.g. Solves the question: What is the probability of a 78 if the population mean is 60 and sd is 7?)
Z-Score from Mean (e.g. Solves the question: What is the probability of 25 students scoring a 78 if the population mean is 60 and sd is 7.

Select Sample Screen Shots

Z-Crash Course & Calculator Discounted Package

Z-Crash Course & Calculator Discounted Package

Lookup Areas under the normal curve with 7 calculators with auto-updating graphs

Lookup Areas under the normal curve with 7 calculators with auto-updating graphs

The tutorial includes many visualizations and FAQ's

The tutorial includes many visualizations and FAQ

A 51 pages tutorial with 11 helpful lessons and plenty of exercises

A 51 pages tutorial with 11 helpful lessons and plenty of exercises

Topics Covered

  • Interpreting a z-score
  • Percent of area above a z-score
  • Percent of area below a z-score
  • Percent of area BETWEEN two z-scores
  • Standard Scores
  • The Empirical Rule
  • Z-Scores for a sample Mean
  • Standard Error of the Mean

What Customers are Saying:

We are very impressed with the zScore Calculator tool.

Dr. Ann-Margaret Esnard
Director, Visual Planning Technology Lab
Florida Atlantic University
The ZScore calculator not only simplifies the statistical process of using z-scores but it makes evaluation results easier to explain.

Dr. Jim Kimes
Prof. Emeritus, University of Missouri-St. Louis and Cross-word Puzzle maven
This is a great product, it is a lot faster than looking through the table and you know you won't make mistakes looking the scores up. Highly recommended.

Dr. Hassan Ramadan
Residency Program Director
Head & Neck Surgery
West Virginia University


    $29.99     Now :  

If you will be making copies or distributing the product, please purchase the site license All major credit cards, debit cards and PayPal Accepted.
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