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.
COVERAGE RATIONALE. Indications for Coverage. ï· Durable Medical Equipment (DME) is a Covered Health Service when the member has a Durable Medical. Equipment benefit, the equipment is ordered by a physician to treat an injury or sickness (illness) and the. equipment is not otherwise excluded in the benefit document.