Bioequivalence and Bioavailability Forum

Weighting! [Bioanalytics]

posted by Helmut  – Vienna, Austria, 2009-07-10 16:07 (5397 d 08:46 ago) – Posting: # 3953
Views: 4,580

Dear Ohlbe!

❝ Weighing or weighting ?

Oops! No balance (EN-UK) or scale (EN-US) is involved (weighing), we apply weights on the data; the correct term is weighting.

❝ […] a practical example (in which they concluded that for that method, weighting should be 1/X^1.754 ).

Yes, why not.

Some other useful references:

• Draper NR, Smith H. Applied Regression Analysis. New York: Wiley; 3^rd ed, 1998.
  The standard textbook, but requires basic knowledge of matrix algebra!
  
• Miller JN, Miller JC. Statistics and Chemometrics for Analytical Chemistry. London: Pearson; 5^th ed, 2005.
  My personal favourite; a must for the bookshelf of all analytical chemists.
  
• Almeida AM, Castel-Branco MM, Falcão AC. Linear regression for calibration lines revisited: weighting schemes for bioanalytical methods. J Chromatogr B. 2002;774:215–22. doi:10.1016/S1570-0232(02)00244-1
  
• Fox J. Applied Regression, Generalized Linear Models, and Related Methods. New York: Sage Publications; 2^nd ed, 2008. website
  For R nerds only!

—
Dif-tor heh smusma 🖖🏼 Довге життя Україна! 
Helmut Schütz


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Science Quotes

Complete thread:

• Regarding US FDA guidelines sri 2009-07-09 13:01 [Bioanalytics] 
  • Calibration curve issues Helmut 2009-07-09 13:48
    • Calibration curve issues ElMaestro 2009-07-09 18:38
      • Weighing Helmut 2009-07-09 19:24
        • Weighing ElMaestro 2009-07-09 20:06
          • Weighing Helmut 2009-07-09 21:00
            • Weighing or weighting ? Ohlbe 2009-07-10 10:33
              • Weighting!Helmut 2009-07-10 14:07
                • Weighting! yjlee168 2009-07-16 12:05