The air in poultry-processing plants often contains fungus spores, especially in the summer. Inadequate ventilation can affect the health of the workers. To measure the presence of spores, air samples are pumped to an agar plate and "colony-forming units (CFUs)" are counted after an incubation period. An inspector for the Occupational Safety and Health Administration collects air samples from both the kill room and the processing room of a large poultry-processing plant on a random sample of 4 days over one summer. Why are the data collected considered matched pairs data?

Question

Quizplus · Accepted Answer

The data collected are considered matched pairs data because for each day, one measurement was taken from both the kill room and the processing room. This creates a natural pairing of the data for each day, making it appropriate to analyze the differences between the two rooms using a paired t-test.

The Air in Poultry-Processing Plants Often Contains Fungus Spores, Especially