Question: 4. Before determining the amount of Na;CO: in a sample, you decide to check your procedure by analyzing a sample known to be 98.76% w/w

4. Before determining the amount of Na;CO: in a sample, you decide to check your procedure by analyzing a sample known to be 98.76% w/w NazCO:. Five replicate determinations of the %w/w NazCO: in the standard gave the following results. 98.71% 98.59% 98.62% 98.44% 98.58% Using a = 0.05, is there any evidence that the analysis is giving inaccurate results

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