Carbon monoxide (CO) in the home is caused by faulty
furnaces burning natural gas or heating oil. Concentrations above 35 parts per
million (ppm) is considered dangerous. Suppose that a municipal home inspector
randomly samples 180 houses around the city and records the age of the furnace
and the carbon monoxide concentration during one day in the winter heating
season. Conduct a statistical analysis to determine whether the age of the
furnace and CO concentrations are related.
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