Question: Analyzes are made by atomic absorption method for the determination of iron in a used jet engine oil. It Repeated measurements were made with 18

Analyzes are made by atomic absorption method for the determination of iron in a used jet engine oil. It

Repeated measurements were made with 18 g / mL standard solution to check the accuracy of the method. Made 10

As a result of the analysis, an average of 18.5 g / mL and standard deviation s = 0.6 g / mL Fe were found.

Calculate the 90% and 99% confidence intervals of the mean, and there is no systematic error at each confidence interval.

decides not?

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