. The increased use of wood for residential heating has caused some concern over the pollutants and irritants released into the air. In one reported study in the northwestern United States, the total suspended particulates (TSP) in nine air samples had a mean of 72. Assuming that the TSP is normally distributed with a standard deviation of 23, estimate the upper limit of the true mean TSP in a 95% confidence interv

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2. The increased use of wood for residential heating has caused some concern over the pollutants
and irritants released into the air. In one reported study in the northwestern United States, the
total suspended particulates (TSP) in nine air samples had a mean of 72. Assuming that the TSP is
normally distributed with a standard deviation of 23, estimate the upper limit of the true mean TSP
in a 95% confidence interval.

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