Population

Statisticians define a population as the entire "universe" of items with which you are concerned.

For example, you are attempting to caculate the median age of a group of participants in a survey. Twenty respondents answer your questionnaire. Here, the age of all twenty participants is your population. Sometimes, a the number of observations in a population is denoted as "n." In the above example, n=20 (the twenty survey respondents.)

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