Methyl t-butyl ether (MTBE) is an organic water contaminant that often results from gasoline spills. The level
Question:
Methyl t-butyl ether (MTBE) is an organic water contaminant that often results from gasoline spills. The level of MTBE (in parts per billion) was measured for a sample of 12 well sites located near a gasoline service station in New Jersey (Environmental Science & Technology, January 2005). The data are listed in the accompanying table.
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a. Give a point estimate for m, the true mean MTBE level for all well sites located near the New Jersey gasoline service station.
b. Calculate and interpret a 99% confidence interval for μ.
c. What assumptions are required for the interval, part b, to be valid? Are these assumptions reasonably satisfied?
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a Using MINITAB the descriptive statistics are Descriptive Statistics MTBE Variable N Mean StDev Minimum Q1 Median Q3 Maximum MTBE 12 9717 11376 800 1...View the full answer
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Related Book For 
Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich
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