The manager of a paint supply store wants to estimate the actual a mount of pain
ID: 2921147 • Letter: T
Question
The manager of a paint supply store wants to estimate the actual a mount of paint contained in 5-litre cans purchased from a nationally known manufacturer. It is known from the manufacturer's specifications that the population standard deviation of the amount of paint is equal to 0.25 litres. A random sample of 85 cans is selected, and the sample mean amount of paint per 5-litre can is 4.98 litres. Calculate a 95% confidence interval estimate of the population mean amount of paint included in a 5-litre can. Round your answer to two decimal places with the lower bound first and the upper bound last. We are 95% confident that the true population mean amount of paint included in a 5-litre can is between _______ and _______ litres.
If the manager of the same paint supply store wants to estimate the mean amount of paint in a 5-litre can to be within LaTeX: pm±0.05 litres with 90% confidence, what sample size is needed?
Explanation / Answer
1)
GIVEN:
CI:
2)
GIVEN:
SAmple size determination:
sd= 0.25 n= 85 mean 4.98Related Questions
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