Standard deviation (SD) of the scale scores for a group of students. The scale score SD indicates how far away scale scores are from the scale score mean. About 68 percent of the scores will be within plus or minus one standard deviation from the mean. About 95 percent of the scores will be within plus or minus 13.
Definition of metaphor for English Language Learners. : 1  a word or phrase for one thing that is used to refer to another thing in order to show or suggest that they are similar. : 2  an object, activity, or idea that is used as a symbol of something else.
The system metaphor is one of the trickier parts of XP (Extreme Programming). This presentation is from a tutorial taught at several of the early agile conferences, and includes material supporting the exercises. CC-BY-SA. Published in: Technology, Entertainment & Humor.