The range rule tells us that the standard deviation of a sample is approximately equal to one fourth of the range of the data. In other words s = (Maximum â Minimum)/4. This is a very straightforward formula to use, and should only be used as a very rough estimate of the standard deviation.
Often abbreviated as âDMEâ, durable medical equipment includes various types of walking aids, transfer equipment, bath safety and wheelchairs. As the name implies, this category must be manufactured and tested to be âdurableâ because patients who use this equipment rely on it to keep them safe and comfort.
List of Durable Medical Equipment Items. This is a list of items you may need to use to manage your health or the health of a loved one. Many of these items are covered by Medicare. Air Cleaners. Air Conditioners. Air-Fluidized Bed. Alternating Pressure Pads and Mattresses. Audible/Visible Signal Pacemaker Monitor. Augmentative Communication Device. Bathtub Lifts.