CompTIA Strata *In the event that you fail your first (1st) attempt to pass any CompTIA certification examination, CompTIA does not require any waiting period between the first (1st) and second (2nd) attempt to pass such examination.
See normal distribution for the bell curve in statistics. The Bell Curve is a controversial, best-selling 1994 book by Richard J. Herrnstein and Charles Murray exploring the role of intelligence in American life. The authors became notorious for the book's discussion of race and intelligence in Chapters 13 and 14.
The Bell Curve is fairly large for a book of its popularity, weighing in at 845 pages in the first printing and 879 in the revised paperback form. Much of its material is technical and academic, but the book's statistical explanations are styled to appeal to a general audience.