Scrubbers A factory recently installed new pollution control equipment ("scrubbers") on its
smokestacks in hopes of reducing air pollution levels at a nearby national park. Randomly
timed measurements of sulfate levels (in micrograms per cubic meter) were taken before
(Set C1) and after (Set C2) the installation. We believe that measurements of sulfate levels
are normally distributed. Write a complete conclusion about the effectiveness of these
scrubbers based on the statistical software printout shown.

Question

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The Answer of Scrubbers A factory recently installed new pollution control equipment ("scrubbers") on its
smokestacks in hopes of reducing air pollution levels at a nearby national park. Randomly
timed measurements of sulfate levels (in micrograms per cubic meter) were taken before
(Set C1) and after (Set C2) the installation. We believe that measurements of sulfate levels
are normally distributed. Write a complete conclusion about the effectiveness of these
scrubbers based on the statistical software printout shown.

Scrubbers a Factory Recently Installed New Pollution Control Equipment ("Scrubbers")