Concept explainers
a.
Construct a histogram for the pH levels of the sampled wells and estimate the proportion of wells with pH values less than 7.0.
b.
Construct a histogram for the MTBE values for the wells with detectible levels of MTBE and estimate the proportion of contaminated wells with MTBE values that exceed 5 micrograms per liter.
c.
Find the mean and standard deviation for the pH levels of the sampled wells.
Construct the interval
d.
Find the mean and standard deviation for the MTBE levels of the sampled wells.
Construct the interval
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Statistics (13th Edition)
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