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.
Sallie Mae says that for a $10,000 loan, borrowed at 6.75 percent over a term of 10 years, and deferred for two years, the savings compared with a federal Plus loan would be more than $1,800. The savings are greater if the rate is lower, and if payments are made while the student is in school.