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.
The origin of Presidentsâ Day lies in the 1880s, when the birthday of Washingtonâcommander of the Continental Army during the American Revolution and the first president of the United Statesâwas first celebrated as a federal holiday. In 1968 Congress passed the Uniform Monday Holiday Bill, which moved a number of federal holidays to Mondays.