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.
Prior to a discussion about paying for durable medical equipment, it is helpful to have a clear understanding of what durable medical equipment is and to define some of the related terms and acronyms. Durable Medical Equipment (DME) as well as the terms, Home Medical Equipment (HME) and home healthcare equipment are used interchangeably. They refer to re-usable, long lasting, medical equipment for use in the home that helps individuals to function on a daily basis.