Problem: You tabulate the data and plot it in a histogram and notice that it follows a Gaussian distribution. You also notice that while the average handspan is 10.16 cm, approximately 22.6% of the lengths fall between this average and a minimum size of 9.90 cm, and that about an additional 15.5% fall between the average adn a maximum span of 10.34 cm.

Part A: What is the approximate standard deviation for men's hands, based on this information?

It'd be really helpful if you could show all steps to find the approximate standard deviation for men's hands. Thanks.