The standard deviation is expressed in the same units as the mean is, whereas the variance is expressed in squared units, but for looking at a distribution, you can use either just so long as you are clear about what you are using.
2322. Presidents Day (or Presidents' Day), is the common name for the federal holiday officially designated as Washington's Birthday. As the first federal holiday to honor an American citizen, the holiday was celebrated on Washington's actual birthday in 1796 (the last full year of his presidency) on February 22.
Itâs Presidents Day, aka George Washingtonâs birthday, on which the U.S. celebrates the birth of its first commander in chief and honors the 42 others who succeeded him. The holiday has been officially observed since 1879 in one form or another.