Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL (a) by a single analysis, (b) as the average of the two analyzes, (c) Calculate the 80% and 95% confidence intervals if found as the mean of four analyses.
Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL (a) by a single analysis, (b) as the average of the two analyzes, (c) Calculate the 80% and 95% confidence intervals if found as the mean of four analyses.
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For the determination of iron in used jet engine oil, 30 analyzes with 3 repetitions each were made by atomic absorption method and the standard deviation was found s=2.4 µg Fe/mL. Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL
(a) by a single analysis,
(b) as the average of the two analyzes,
(c) Calculate the 80% and 95% confidence intervals if found as the mean of four analyses.
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