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The yield of a chemical process is being studied. From
Chapter 8, Problem 11E(choose chapter or problem)
The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and . The past five days of plant operation have resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95, and 91.3. Find a 95% two-sided confidence interval on the true mean yield.
Questions & Answers
QUESTION:
The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and . The past five days of plant operation have resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95, and 91.3. Find a 95% two-sided confidence interval on the true mean yield.
ANSWER:Step 1 of 2
Given,
The standard deviation,
CI = 95%
Sample size, n = 5.
For a sample mean, , of a random sample of size n from a normal population with known variance , a Confidence Interval on is given by,