July 2012
Intermediate to advanced
352 pages
9h 30m
English
book
Common Errors in Statistics (and How to Avoid Them), 4th Edition
by Phillip I. Good, James W. Hardin
Content preview from Common Errors in Statistics (and How to Avoid Them), 4th Edition
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OBJECTIVES
A DQA has many objectives. The first is immediate. You need to determine whether a decision or estimate can be made with the desired level of certainty, given the quality of the data. The remaining objectives look toward future efforts:
- Were the response variables appropriate? Should additional data (potentially confounding factors) have been recorded?
- Were the measuring devices adequate?
- Are the recorded values all within predefined limits?
- How well did the sampling design perform?
- If the same sampling design strategy were used again in a similar study, would the data support the same intended use with the desired level of certainty?
- Were sufficient samples taken (after correcting for missing data) to detect an effect of practical significance if one were present?
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