Petroleum waste contamination. Accidental spillage and misguided disposal of petroleum wastes have resulted in extensive contamination of
Question:
a. Use a 99% confidence interval to estimate the mean percentage of B(a)p removed from a soil specimen in which the toxin was used.
b. Interpret the interval in terms of this application.
c. What assumption is necessary to ensure the validity of this confidence interval?
d. Comment on whether the true mean percent removed could be as high as 50%.
e. Find and interpret a 90% confidence interval for the true variance in the percentages of B(a)p removed.
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Related Book For
Statistics For Business And Economics
ISBN: 9780321826237
12th Edition
Authors: James T. McClave, P. George Benson, Terry T Sincich
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