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Question 250:

1)For n = 49, find the 90% confidence interval for x bar = 85 and = 2. Do not round!

2)A purchasing agent for a national chain of seafood restaurants wants to estimate the mean weight of shrimp in a large catch. How many shrimp should be sampled from the catch to be 95% confident that the sample mean will be off from the actual mean weight by no more than 1.4 grams. Assume that = 4 grams.

3)Find the 99% confidence interval for a sample size of 25, x bar = 150, and s = 3. Round your final answer to two decimal places.

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