The illustration shows a generic example of a box plot with the maximum, third quartile, median, first quartile, and minimum values labeled. The relative vertical spacing between the labels reflects the values of the variable in proportion.
Respirator Types Two basic types of respirators are: â¢ air-purifying; andâ¢ supplied-air respirators. Air-purifying respirators remove airborne contaminants such as particles, toxic vapors, and/or gases.
Some employees may be unable to achieve an adequate fit with certain respirator models or a particular type of respira-. tor (e.g., half-face air-purifying respirator) so that an alternative respirator model that provides an adequate fit or other. type of respirator that provides adequate protection must be used.