An atomic absorption method for determination of copper in fuel samples yielded a pooled standard deviation of
Question:
An atomic absorption method for determination of copper in fuel samples yielded a pooled standard deviation of spooled = 0.19 mg Cu/mL (s→σ). The analysis of an oil from a reciprocating aircraft engine showed a copper content of 6.87 mg Cu/mL. Calculate the 95% and 99% confidence intervals for the result if it was based on
(a) A single analysis,
(b) The mean of 4 analyses, and
(c) The mean of 16 analyses.
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Solution a The 95 confidence limit for copper in 4 analyses is 0914mg CumL which is greater than the ...View the full answer
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Related Book For 
Fundamentals Of Analytical Chemistry
ISBN: 9780357450390
10th Edition
Authors: Douglas A. Skoog, Donald M. West, F. James Holler, Stanley R. Crouch
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