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Q4. The analysis of iron content in a soil sample using atomic absorption gave the variance for a single determination of 0.070 and a relative

Q4. The analysis of iron content in a soil sample using atomic absorption gave the variance for a single determination of 0.070 and a relative sampling variance of 0.120. Evaluate the error (a = 0.05) if five samples are collected, each of which is analysed two times

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