Construct a 95% confidence interval for difference between the mean amount of oil extracted by Methods 1 and 4. Compare the answer to Part (b) of Exercise 13.31.

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Chapter 13.10, Problem 56E

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Construct a 95% confidence interval for difference between the mean amount of oil extracted by Methods 1 and 4.

Compare the answer to Part (b) of Exercise 13.31.

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