Fig. 2.

Box plot of fibre exposure in fibre per cm³ for job groups in Plants A, B and C. The exposure for the cleaning operator is not included due to too few exposure measurements. The box bounds the 25th and 75th percentiles, encompasses 50% of the data and includes the median (solid line within the box). Dispersion of the data above and below this range is marked by whiskers that extend to the 10th and 90th percentiles. Points above or below the whiskers represent the 95th and 5th percentiles.