A recently hired lab analyst and a more experienced analyst both performed replicate analyses of Pb in a proficiency test sample via ICP-MS and obtained the results below: new analyst mean = 14.5, ppb, standard deviation = 0.53 ppb, n = 6 samples experienced analyst mean = 13.95 ppb, standard deviation = 0.42 ppb, n = 5 samples Determine whether or not these two sets of results are equivalent or not at the 95% confidence level. Be sure to show your work (i.e., computed mean, standard deviation, etc.) and how you arrived at your conclusion.
A recently hired lab analyst and a more experienced analyst both performed replicate analyses of Pb in a proficiency test sample via ICP-MS and obtained the results below: new analyst mean = 14.5, ppb, standard deviation = 0.53 ppb, n = 6 samples experienced analyst mean = 13.95 ppb, standard deviation = 0.42 ppb, n = 5 samples Determine whether or not these two sets of results are equivalent or not at the 95% confidence level. Be sure to show your work (i.e., computed mean, standard deviation, etc.) and how you arrived at your conclusion.
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
ChapterA1: Evaluation Of Analytical Data
Section: Chapter Questions
Problem A1.8QAP
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Transcribed Image Text:3. A recently hired lab analyst and a more experienced analyst both performed replicate analyses of Pb
in a proficiency test sample via ICP-MS and obtained the results below:
new analyst
experienced analyst
mean = 14.57 ppb, standard deviation = 0.53 ppb, n = 6 samples
mean = 13.95 ppb, standard deviation = 0.42 ppb, n = 5 samples
Determine whether or not these two sets of results are equivalent or not at the 95% confidence level.
Be sure to show your work (i.e., computed mean, standard deviation, etc.) and how you arrived at
your conclusion.
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