SOLUTION: (a) The quality control department of Red Stripe Jamaica Ltd is interested in estimating the actual amount of Red Stripe Beer that is placed in 275 ml bottles at its local bottling

Question 637144: (a) The quality control department of Red Stripe Jamaica Ltd is interested in estimating the actual amount of Red Stripe Beer that is placed in 275 ml bottles at its local bottling plant. If the standard deviation for 275 ml bottles is 0.05 ml and a random sample of one hundred 275 ml bottles obtained from the QC department indicates a sample average of 1.99 ml.

(i) Set up a 95 % confidence interval of the true average amount of beer in each bottle.
(ii) What would be your answer if a 98% confidence was used
(iii) If the QC department wants to have 99% confidence and a sampling error of .03, what sample size is required?
(iv) What are the properties of a good estimator discuss briefly.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
(a) The quality control department of Red Stripe Jamaica Ltd is interested in estimating the actual amount of Red Stripe Beer that is placed in 275 ml bottles at its local bottling plant. If the standard deviation for 275 ml bottles is 0.05 ml and a random sample of one hundred 275 ml bottles obtained from the QC department indicates a sample average of 1.99 ml.
(i) Set up a 95 % confidence interval of the true average amount of beer in each bottle.
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x-bar = ?
Comment: I can't believe the sample average is 1.99 ml.
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Cheers,
Stan H.
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(ii) What would be your answer if a 98% confidence was used
(iii) If the QC department wants to have 99% confidence and a sampling error of .03, what sample size is required?
(iv) What are the properties of a good estimator discuss briefly.

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