Statistics Notation. This web page describes how symbols are used on the Stat Trek web site to represent numbers, variables, parameters, statistics, etc.
Capitalization In general, capital letters refer to population attributes (i.e., parameters); and lower-case letters refer to sample attributes (i.e., statistics). For example, P refers to a population proportion; and p, to a sample proportion. Online Statistics Calculator, basic math statistics, Tutorial. Www.numbeo.com/cost-of-living/country_result.jsp?country=Spain.