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.
Below is a list of valves that are used in lumbarâperitoneal shunts (LP shunts) and Cerebral shunts (for a more detailed list of the types of valves see type of valves): 1  Delta. 2  Medium Pressure Cylindrical. 3  Nulsen and Spitz.  Anti- 1 Siphon. Sigma.