Which statement best describes the role of folders in your operating system?
a. folders scan your hard disk for errors and then provide a follow-up report.
b. folders allow you to organize and maintain files.
c. folders make it possible to retrieve recently deleted files.
d. folders your computer boot up.

Asample of 200 rom computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: 8, 19, 27, 17, 38, 18, 4, 27, 9, 22, 30, 17, 14, 23, 15, 14, 12, 20, 13, 18, 14, 20, 9, 27, 30, 13, 10, 19, 12, 26. construct a p chart and examine it for any out-of-control points. (round your answers to four decimal places.)