Standard deviation is the square root of the variance and is expressed in the same units as the data

Benefits paid for customary charges incurred during an examination by an ophthalmologist or optometrist are included in

A) vision care insurance B) basic physician's expense insurance C) disability income insurance D) surgical expense insurance

The advantage of building data flow diagrams based on events is that:

A) events are small scale and easy to analyze for input and output. B) users are familiar with the events within their business and know how the events drive other activities. C) events fall into one of four categories: read, update, create, delete. D) events are predictable and lend a high degree of stability to the data flow diagram.