Editing Statistic (section)

==Examples==
Some examples of statistics are:
* "In a recent survey of Americans, '''52%''' of women say global warming is happening."

In this case, "52%" is a statistic, namely the percentage of women in the survey sample who believe in global warming. The population is the [[Set (mathematics)|set]] of all women in the United States, and the population parameter being estimated is the percentage of ''all'' women in the United States, not just those surveyed, who believe in global warming.

* "The manager of a large hotel located near Disney World indicated that 20 selected guests had a mean length of stay equal to '''5.6''' days."

In this example, "5.6 days" is a statistic, namely the mean length of stay for our sample of 20 hotel guests. The population is the set of all guests of this hotel, and the population parameter being estimated is the mean length of stay for ''all'' guests.{{sfn|Kokoska|2015|p=296-297}} Whether the estimator is unbiased in this case depends upon the sample selection process; see [[Renewal theory#The inspection paradox|the inspection paradox]].

There are a variety of functions that are used to calculate statistics. Some include:
* [[Sample mean]], [[sample median]], and [[Mode (statistics)|sample mode]]
* [[Sample variance]] and sample [[standard deviation]]
* Sample [[quantile]]s besides the [[median]], e.g., [[quartile]]s and [[percentile]]s
* [[Test statistic]]s, such as [[t-statistic]], [[chi-squared statistic]], [[F-test|f statistic]]
* [[Order statistic]]s, including sample maximum and minimum
* Sample [[moment (mathematics)|moments]] and functions thereof, including [[kurtosis]] and [[skewness]]
* Various [[Functional (mathematics)|functionals]] of the [[empirical distribution function]]