Suppose that a supermarket wanted to estimate the correct amount of milk contained in a 2 litres bottle from the supplier. It is known from the supplier’s specifications that the standard deviation of the amount of milk is equal to 0.08 litre. A random sample of 81 bottles is selected and measured and found that the average volume of milk in the bottle is 2.02 litres. Assume a normal distribution of fill. Set up a 99% confidence interval estimate of the true population average amount of milk included in a two-litre milk bottle. (Round off to 3 decimal places) Critical value 90% is 1.645 95% is 1.96 99% is 2.58 What is the upper limit for the true population average amount of milk included in a two-litre milk bottle?
Suppose that a supermarket wanted to estimate the correct amount of milk contained in a 2 litres bottle from the supplier. It is known from the supplier’s specifications that the standard deviation of the amount of milk is equal to 0.08 litre. A random sample of 81 bottles is selected and measured and found that the average volume of milk in the bottle is 2.02 litres. Assume a
Set up a 99% confidence
Critical value
90% is 1.645
95% is 1.96
99% is 2.58
What is the upper limit for the true population average amount of milk included in a two-litre milk bottle?
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