STATISTICS FROM A TO Z<br />-- CONFUSING CONCEPTS CLARIFIED
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New Video: Sample Size Part 1 -- Proportions of Count Data

11/24/2019

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I just uploaded a new video, Sample Size Part 1 – Proportions of Count Data​  
This was uploaded to my YouTube channel Statistics From A to Z, Confusing Concepts Clarified. It will be part of a playlist on Samples and Sampling. 
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See the Videos page of this website for the latest status of my statistics videos completed and planned
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Statistics Tip -- Binomial Trial: when a failure is a success

11/16/2019

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​Confusing language and terminology is a big part of what makes statistics confusing. Each Binomial Trial -- also known as a Bernoulli Trial -- is a random experiment with only 2 possible outcomes, called "success" and "failure".  The Probability of success is the same every time the experiment is conducted. 
 
A coin flip illustrates this perfectly. You either get "heads" or "tails", and the Probability of each coin flip (Binomial Trial) is always 50% heads (or 50% tails). 
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​In a Binomial Trial, each trial is counted as either a success or failure. And a success is defined as what we want to count. Let's say we are performing quality control in a manufacturing process. We are counting defects. Every time we find a defect, we add 1 to the count of "successes".
 
I always found that confusing, so in the book, instead of saying "success" or "failure", I suggest saying "yes" or "no".
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New Video: Samples, Sampling

11/13/2019

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I just uploaded a new video, "Samples, Sampling", to my YouTube channel. Here's the link to the video:  https://youtu.be/bvglAgAZtXE. It is the first in a playlist on Samples. The other two videos will be about how to determine the Sample Size for Proportions and Count Date, and Sample Size for Measurement/ Continuous Data.

​Here are the 6 Keys to Understanding the concept. This 17 minute video explains them in detail.
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    Author

    Andrew A. (Andy) Jawlik is the author of the book, Statistics from A to Z -- Confusing Concepts Clarified, published by Wiley.

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  • Home
    • Why This Book Is Needed
    • Articles List, Additional Concepts
    • Examples: 1-Page Summaries
    • Examples: Concept Flow Diagram
    • Examples: Compare and Contrast Tables
    • Examples: Cartoons
    • Example: Which to Use When Article
  • Buy
  • Blog
  • Sample Articles
  • Videos
  • Author
  • Communicate
  • Files
  • Errata