The following data represent the wait time, in minutes, for customers calling Dell technical support. 
(See the Excel Data File.) The interquartile range is ________.
Definitions:
Interest Expense
The cost incurred by an entity for borrowed funds, which is considered a non-operating expense on the income statement.
Effective Interest Method
A way of amortizing bond premiums or discounts over the bond's life that reflects the constant yield to maturity.
Premium Amortization
The process of gradually writing off the initial premium paid on a bond above its par value over the life of the bond.
Bonds
Bonds are financial instruments representing a loan made by an investor to a borrower, typically corporate or governmental, which pays interest over time and returns the principal at maturity.
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