An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling30 triplicate analyses to have a standard deviation s = 3.1 µg Fe/mL. If s is a good estimate of o, calculate the 95 and 99%confidence intervals for the result 21.7 µg Fe/mL if it was based on the following criteria.(a) a single analysis95% confidence interval= 21.7 +99% confidence interval = 21.7 +(b) the mean of two analyses95% confidence interval = 21.7 +99% confidence interval=(c) the mean of six analyses21.7 ±95% confidence interval = 21.7 +99% confidence interval= 21.7 +μg Fe/mLμg Fe/mLμg Fe/mLμg Fe/mLμg Fe/mLμg Fe/mL

Solutions- a standard deviation s = 3.1 µg Fe/mL. calculate the 95 and 99% confidence intervals…

An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling 30 triplicate analyses to have a standard deviation s = 3.1 µg Fe/mL. If s is a good estimate of o, calculate the 95 and 99% confidence intervals for the result 21.7 μg Fe/mL if it was based on the following criteria. (a) a single analysis 95% confidence interval = 21.7 + 99% confidence interval = 21.7 + (b) the mean of two analyses 95% confidence interval= 21.7 + 99% confidence interval= 21.7 + (c) the mean of six analyses 95% confidence interval= 21.7 + 99% confidence interval= 21.7 ± μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL

An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling 30 triplicate analyses to have a standard deviation s = 3.1 µg Fe/mL. If s is a good estimate of o, calculate the 95 and 99% confidence intervals for the result 21.7 μg Fe/mL if it was based on the following criteria. (a) a single analysis 95% confidence interval = 21.7 + 99% confidence interval = 21.7 + (b) the mean of two analyses 95% confidence interval= 21.7 + 99% confidence interval= 21.7 + (c) the mean of six analyses 95% confidence interval= 21.7 + 99% confidence interval= 21.7 ± μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL

Chemistry

10th Edition

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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