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.
Most federal holidays are clear-cut. On the Fourth of July, for example, Americans celebrate the adoption of the Declaration of Independence in 1776. On the other hand, Presidentsâ Day is a slightly strange holiday for three main reasons: *There is no universal agreement on the actual name of the holiday. * There is no universal agreement on which presidents are being honored.