Accounting's assignment of numbers to economic events follows a set of generally accepted guidelines indicating what event characteristics, or attributes, should be measured for communication. The guidelines also indicate the conditions which must exist before an event is recognized and the selected attributes measured. One characteristic of economic events not explicitly accounted for is the uncertainty of the dollar valuations assigned to account balances. Each accounting estimate implies a variability of some unspecified magnitude.1 Therefore, any estimated single figure recorded for the account balance should be considered in terms of its likelihood or probability. The finance and economics literature generally accepts the notion that in his decision-making capacity man reacts to risk. In many economic situations, he acts as a risk-averter preferring less risk to more.2 Without