Mathematics, 27.11.2019 19:31 Fdl52417
The yield of a chemical process is being studied. from previous experience, yield is known to be normally distributed and σ=3. the past five days of plant operation have resulted in the following yields 91.6, 88.75, 90.8, 89.67, and 91.7. find a 95% two-sided confidence interval on the true mean yield. (a) calculate the sample mean. round your answer to 2 decimal places.
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