Mean. The mean of an observation variable is a numerical measure of the central location of the data values. It is the sum of its data values divided by data count. Hence, for a data sample of size n, its sample mean is defined as follows:Similarly, for a data population of size N, the population mean is:ean. The mean of an observation variable is a numerical measure of the central location of the data values. It is the sum of its data values divided by data count. Hence, for a data sample of size n, its sample mean is defined as follows:
Names of territorial origin were common, a man would have had the surname Langford if he was from the village of Langford. An example of this is Osm' de Langeford who was recorded in the Pipe Rolls for Wiltshire in 1130. The name Osm' de Langeford means Osm' from the village of Langford.
Possibly the most common of these names was William, derived from elements wil and helm, meaning desire and helmet, protection. The surname Wilson is first recorded in England as Willeson in 1324ï¼ and in Scotland as Wulson in 1405.t is the seventh most common surname in England, and tenth most common in the United States. Wilson is also now quite common as a surname in many other countries with a large English-speaking population such as Canada, Australia, South Africa, and New Zealand.