Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The total concentrations ( ± standard deviation) of m- and p-xylene were Turnpike: 31.4 ± 27.0 μg/m3 (32 measurements) Tunnel: 54.9 ± 29.8 μg/m3 (32 measurements) Do these results different at the 95% confidence level?
Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The total concentrations ( ± standard deviation) of m- and p-xylene were Turnpike: 31.4 ± 27.0 μg/m3 (32 measurements) Tunnel: 54.9 ± 29.8 μg/m3 (32 measurements) Do these results different at the 95% confidence level?
Chapter8: Sampling, Standardization, And Calibration
Section: Chapter Questions
Problem 8.17QAP
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Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey
Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The total
concentrations ( ± standard deviation) of m- and p-xylene were
Turnpike: 31.4 ± 27.0 μg/m3 (32 measurements)
Tunnel: 54.9 ± 29.8 μg/m3 (32 measurements)
Do these results different at the 95% confidence level?
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