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MATH 533 Week 4 | Quiz

Questions: 1-10Q1. A random sample of 89 observations produced a mean x = 25.7 and a standard deviation s=2.5. a.  Find a 95% confidence interval for u. b.  Find a 90% confidence interval for u. c.  Find a 99% confidence interval for u. Q2. A company wants to test a randomly selected sample of n water specimens and estimate the mean daily rate of pollution produced by a mining operation. If the company wants a 95% confidence interval estimate with a sampling error of 1.1 mil..

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