When the method used to collect a sample biases any conclusions that might be drawn from it, the sample is said to have a selection bias

If the interest rate falls, other things being equal, investment spending will

A) fall. B) rise. C) either rise, fall, or remain unchanged. D) not be affected.

The Fed's power to set the required reserves of commercial banks:

A. provides a certain source of interest income for commercial banks. B. allows the Fed to control the lending ability of commercial banks and, thereby, control the money supply. C. prevents banks from hoarding too much vault cash. D. prevents commercial banks from earning excess profits.