In the study described in the paper Exposure to Diesel Exhaust Induces Changes in EEG in Human

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In the study described in the paper €œExposure to Diesel Exhaust Induces Changes in EEG in Human Volunteers€ (Particle and Fibre Toxicology [2007]), 10 healthy men were exposed to diesel exhaust for 1 hour. A measure of brain activity (called median power frequency, or MPF) was recorded at two different locations in the brain both before and after the diesel exhaust exposure. The resulting data are given in the accompanying table. For purposes of this exercise, assume that it is reason-able to regard the sample of 10 men as representative of healthy adult males.
In the study described in the paper €œExposure to Diesel
In the study described in the paper €œExposure to Diesel

Do the data provide convincing evidence that the mean MPF at brain location 1 is higher after diesel exposure than before diesel exposure? Test the relevant hypotheses using a significance level of 0.05.

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