Alpha a and Beta Errors - PowerPoint PPT Presentation

Loading...

PPT – Alpha a and Beta Errors PowerPoint presentation | free to download - id: 1dc4d8-ZDc1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Alpha a and Beta Errors

Description:

Alpha (a) and Beta ( ) Errors. Knowing Your Risks. Ron Sedlock. ASQ Jacksonville. Education Chair ... rsedlock_at_msn.com. www.thequalitycatalyst.com. Back to ... – PowerPoint PPT presentation

Number of Views:31
Avg rating:3.0/5.0
Slides: 13
Provided by: asq14
Learn more at: http://www.asq1506.org
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Alpha a and Beta Errors


1
Alpha (a) and Beta (ß) Errors
Back to Basics
  • Knowing Your Risks

2
a and ß in 15 minutes
  • Tests of Hypothesis
  • Auditing
  • Acceptance Sampling
  • Design of Experiments
  • Control Charts
  • Summary

3
The Risks Associated witha Jury Trial
Conclusion
Truth
4
The Risks Associated withTests of Hypothesis
Conclusion
Truth
5
The Risks Associated withAuditing
Conclusion
Truth
6
The Risks Associated withAcceptance Sampling
Conclusion
Truth
7
Operating Characteristic (OC) Curve
Example Sample Plan n50 (acc 5 rej 6)
100
  • ? Risk
  • Type I Error
  • Producers Risk
  • AQL

Probability of acceptance ()
  • ? Risk
  • Type II Error
  • Consumers Risk
  • LTPD

0
Actual defective ()
8
The Risks Associated withDesign of Experiments
Conclusion
Truth
9
The Risks Associated withControl Charts
Conclusion
Truth
10
The a and ß on Control Charts
3s Mean -3s
Important Analyzing patterns on control charts
reduces ß error.
11
Summary
  • There is a and ß in any decision we make based on
    a sample --- even if we dont use statistics.
  • If one is fixed (typically a) the other is varies
    (typically ß).
  • Decreasing one, increases the other.
  • Increasing sample size will decrease both.
  • Bottom Line What is the risk if we make a ß or
    a error.

12
Coming Attractions
  • Next Month ---
  • Process Capability Measurements
  • Up your Ppk
About PowerShow.com