Following are levels of particulate emissions for 65 vehicles driven at sea level, and for 35 vehicles driven at high altitude.

a. Find the median, the first quartile, and the third quartile of the sea-level emissions.

b. Find the median, the first quartile, and the third quartile of the high-altitude emissions.

c. Find the upper and lower outlier bounds for the sea-level emissions.

d. Find the upper and lower outlier bounds for the high-altitude emissions.

e. Construct comparative boxplots for the two data sets. What conclusions can you draw?

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Sea Level 1.5 0.9 1.1 1.3 3.5 1.1 1.1 0.9 1.3 0.9 0.6 1.3 2.5 1.5 1.1 1.1 2.2 0.9 1.8 1.5 1.2 1.6 2.1 6.6 4.0 2.5 1.4 1.4 1.8 1.1 1.6 3.7 0.6 0.6 2.7 2.6 3.0 1.2 1.0 1.6 3.1 2.4 2.1 2.7 1.2 3.3 3.8 1.3 2.1 6.6 1.2 3.1 0.5 0.3 0.5 3.4 3.5 2.7 1.9 5.9 4.2 3.5 3.6 3.1 3.3 4.6 High Altitude 8.9 4.4 3.6 4.4 3.8 2.4 3.8 5.3 5.8 2.9 4.7 1.9 9.1 8.7 9.5 2.7 9.2 7.3 2.1 6.3 6.5 6.3 2.0 5.9 5.6 5.6 1.5 6.5 5.3 5.6 2.1 1.1 3.3 1.8 7.6