Question: 28. A set of 10 determinations, by a method devised by the chemist Karl Fischer, of the percentage of water in a methanol solution yielded

28. A set of 10 determinations, by a method devised by the chemist Karl Fischer, of the percentage of water in a methanol solution yielded the following data.

.50, .55, .53, .56, .54,

.57, .52, .60, .55, .58 Assuming normality, use these data to give a 95 percent confidence interval for the actual percentage.

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