The rule is often called Chebyshev's theorem, about the range of standard deviations around the mean, in statistics. The inequality has great utility because it can be applied to completely arbitrary distributions (unknown except for mean and variance). For example, it can be used to prove the weak law of large numbers. In practical usage, in contrast to the 68-95-99.7% rule, which applies to normal distributions, under Chebyshev's inequality a minimum of just 75% of values must lie within two standard deviations of the mean and 89% within three standard deviations.
City of Page. Welcome to City of Page, Arizona. Page is a small town in northern Arizona located on the southern shores of magnificent Lake Powell. Our friendly community offers visitors outstanding recreation and a wide variety of lodging and services.
Location of Tucson on a map. Tucson is a city found in Arizona, The United States Of America. It is located 32.22 latitude and -110.93 longitude and it is situated at elevation 757 meters above sea level. Tucson has a population of 520,116 making it the 2nd biggest city in Arizona.