Chapter_6

Testresultsmclisthemaximumcontaminantlevelthehighestle

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: pecimen. The mean oxygen level is 4.62 mg, with the overall standard deviation of 0.92. A water purifying company claims that the mean level of oxygen in the water is 5 mg. Conduct a hypothesis test with =0.001 to determine whether the mean oxygen level is less than 5 mg. 3. An agro‐economist examines the cellulose content of a variety of alfalfa hay. Suppose that the cellulose content in the population has a standard deviation of 8 mg. A sample of 15 cuttings has a mean cellulose content of 145 mg. A previous study claimed that the mean cellulose content was 140 mg. Perform a hypothesis test to determine if the mean cellulose content is different from 140 mg if =0.05. 9 How does relate to confidence intervals? If you have a 2‐sided test, and if the and confidence level add to 100%, you can reject H0 if 0 (the number you were checking) is not in the confidence interval. a) Find a 95% confidence interval for the mean cellulose content from the above example. b) Now try the test from p...
View Full Document

Ask a homework question - tutors are online