Question: An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling 30 triplicate

An atomic absorption method for the determination of the amount of iron

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 g Fe/mL. If s is a good estimate of o, calculate the 95 and 99% confidence intervals for the result 21.7 g 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 g Fe/mL ug Fe/mL g Fe/mL ug Fe/mL g Fe/mL g Fe/mL

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