Particulate matter, or PM, refers to particles found in the air, including dust, dirt, soot, smoke, and liquid droplets

Particulate matter, or PM, refers to particles found in the air, including dust, dirt, soot, smoke, and liquid droplets. Particles can be suspended in the air for long time. Some particles are large or dark enough to be seen as soot or smoke. Particles less than 2.5 micrometers in diameter (PMQ.5) are referred to as "?ne" particles and are believed to pose the greatest health risks. PM2.5 is often used as a measure of air quality. An environmental scientist is interested in the air quality of an industry zone that has recently received a lot of complaints. He measured the PMZ.5 index of a randomly selected 16 spots in the zone and obtained the PMZE) readings 60,56,68,78,46,72,66,48,66,56,60,60,38,76,52,58 (a) (2 points) Identify the (statistical) population and sample here. (b) (6 points) Compute the 5-number summary for the sample. What is the lQR? (c) (2 points) Draw a box plot for the sample.