For a symmetric distribution (where the median equals the midhinge, the average of the first and third quartiles), half the IQR equals the median absolute deviation (MAD). The median is the corresponding measure of central tendency. Identification of outliers (see below).
SLM Corporation (commonly known as Sallie Mae; originally the Student Loan Marketing Association) is a publicly traded U.S. corporation that provides consumer banking. Its nature has changed dramatically since it was set up in 1973. At first, it was a government entity that serviced federal education loans.
And last but not least, if your Sallie Mae loans have any underlying federal status, there may be some Department of Education programs that might help. Just because a loan is help by Sallie Mae does not mean some are not eligible for these special programs. For more on this, click here. Here is what is certain, unless we can find a way to fairly deal with your student loan situation and get you to a resolution, it will consumer your life.