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Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey
Chapter 4, Problem 4-20(choose chapter or problem)
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.10 The concentrations ( standard deviations) of m- and p-xylene were Turnpike: 31.4 30.0 g/m3 (32 measurements) Tunnel: 52.9 29.8 g/m3 (32 measurements) Do these results differ at the 95% confidence level? At the 99% confidence level?
Questions & Answers
QUESTION:
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.10 The concentrations ( standard deviations) of m- and p-xylene were Turnpike: 31.4 30.0 g/m3 (32 measurements) Tunnel: 52.9 29.8 g/m3 (32 measurements) Do these results differ at the 95% confidence level? At the 99% confidence level?
ANSWER:At the 95% confidence level, the difference between the concentrations of m- and p-xylene on the