The lengths of a part is measured to the nearest tenth of a…

The lengths of a part is measured to the nearest tenth of a millimeter. The lengths are distributed uniformly with values at every tenth of a millimeter starting at 5.0 mm, 5.1 mm, and 5.2 mm. You may remember this as a homework problem.   This copywritten question is part of a quiz or exam at Arizona State.  It may not be posted on Chegg.com or any other website or reproduced without the permission of the author, Dr. L. Chattin, and Arizona State University.   The standard deviation of the length is ________ mm. Express your answer to four decimal places.