The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
1. Compute the range.
2. Compute the mean deviation.
3. Compute the standard deviation

Please see our guidelines for posting homework problems:

https://www.askmehelpdesk.com/finance-accounting/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html

This is also math, not accounting or finance.