In Environmental Science Technology (Oct 1993), scientists reported on a study of the transport and transformation of PCDD, a pollutant emitted from solid waste incineration, motor vehicles, steel mills, and metal production Ambient air specimens were collected over several different days at two locations in Sweden Rrvik (11 days) and Gothenburg (3 days) The level of PCDD (measured in pg m 3 ) detected in each specimen is recorded here Use interval estimation to compare the variation in PCDD levels at the two locations Draw an inference from the analysis PCDDAIR Rrvik Gothenburg 2 38 3 03 1 44 47 50 61 90 50 22 26 31 46 1 09 2 14

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Question: In Environmental Science & Technology (Oct. 1993), scientists reported on a study of the transport and transformation of PCDD, a pollutant emitted from solid waste

In Environmental Science & Technology (Oct. 1993), scientists reported on a study of the transport and transformation of PCDD, a pollutant emitted from solid waste incineration, motor vehicles, steel mills, and metal production. Ambient air specimens were collected over several different days at two locations in Sweden: Rörvik (11 days) and Gothenburg (3 days). The level of PCDD (measured in pg/m³) detected in each specimen is recorded here. Use interval estimation to compare the variation in PCDD levels at the two locations. Draw an inference from the analysis.

PCDDAIR Rrvik Gothenburg 2.38 3.03 1.44 47 50 .61 .90 .50 .22

PCDDAIR Rrvik Gothenburg 2.38 3.03 1.44 47 50 .61 .90 .50 .22 .26 .31 46 1.09 2.14

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