Statistics/Glossary

This is a glossary of the book.

P

 * primary data : Original data that have been collected specially for the purpose in mind.
 * population : Entire group being considered for data collection, that we want to draw conclusions about. EX: The population of the United States

R

 * Random variable: A function that associates a specific and unique numerical value with each outcome of an experiment. (EX: X or Y) The outcome is denoted as lower case

S

 * sample : a group of units taken from a larger group (the population). Used to draw conclusions of the larger group. EX: 30 people in a town in the US.
 * secondary data : Data that have been collected for another purpose and where we will use Statistical Method with the Primary Data.


 * statistic : A measure that is calculated from a sample of data.


 * Statistical Independence : They do not affect each other