16. 6.73 Assuming there are two i* values determined when an ROR analysis of a nonconventional cash flow series is performed, one guideline for retaining and discarding i* values is:

1. Take the average of the two i* values as the ROR 2. Retain the i* > 0, if one is positive and one is negative 3. Retain the larger i* value, if both are positive 4. Retain the smaller i* value, if both are positive