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.
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?
12 8. 134 11 38 63 150 12 251 367 13 107
Step by Step Answer:
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
Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich
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