A government agency constructs a 95% confidence interval to estimate the mean amount of pollution in a
city's river. Assume that all conditions have been met.
The one-sample t-interval is (1.26, 3.91).
Water with 4.00 units of pollution or more, on average,
of this type of measure is said to be contaminated. Is it
reasonable to believe that this city's river is
contaminated?
O No. Because 4.00 is close to the upper bound of the
interval, it is reasonable to believe the river is not
contaminated
O No. Because the interval representing the mean
amount of pollution is entirely below 4.00, it is
reasonable to believe the river is not contaminated.
O Yes. Because 4.00 is close to the upper bound of
the interval, it is reasonable to believe the river is
contaminated
Yes. Because the interval representing the mean
amount of pollution is entirely below 4.00, it is
reasonable to believe the water is contaminated
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