Suppose that a test procedure about the population proportion P is performed,and that the sample proportion 
is approximately normally distributed.If the alternative hypothesis is H1 : P < P0,then the rejection region for a level α is Z < -zα.
Definitions:
Callable Bonds
Bonds that give the issuer the right to redeem them before their maturity date at a pre-specified price.
Bond Indenture
The underlying contract between the company issuing bonds and the bondholders.
Bond Premium
The additional amount over the face value for which a bond is sold, representing the difference between the bond's issue price and its nominal value.
Straight-line Amortization
A method of evenly spreading the cost of an intangible asset over its useful life for accounting and tax purposes.
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