SOLUTION: suppose we wish to estimate the average yield of a chemical plant. the daily yield is known to vary with a standard deviation of 21 tons. the yield recorded for 50 days produced a
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Question 1171710: suppose we wish to estimate the average yield of a chemical plant. the daily yield is known to vary with a standard deviation of 21 tons. the yield recorded for 50 days produced a mean of 871 tons. find a 90% confidence interval for the mean daily yield of chemical produced
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
half-interval is z(0.95)*sigma/sqrt(n(
=1.645*21/sqrt(50)=4.89
90%CI is (866.11, 875.89) units tons
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