To compute an interquartile range using this definition, first remove observations from the lower quartile. Then, remove observations from the upper quartile. Then, from the remaining observations, compute the difference between the largest and smallest values.
Know the meaning of the carrying value. The carrying value is a calculation performed by the bond issuer, or the company that sold the bond, in order to accurately record the value of the bond discount or premium on financial statements. The discount or premium is amortized, or spread out, over the term of the bond.
Par value, in finance and accounting, means stated value or face value. From this come the expressions at par (at the par value), over par (over par value) and under par (under par value).