STAT 130M Lecture Notes - Tally Marks, Statistic, Frequency Distribution
2 Dec 2013
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Document Summary
: polls, studies, surveys & other data collecting tools collect data from a small part of a larger group so that we can learn something about the larger group. This is a common & important goal of stat; learn about a large group. Data- collections of observations (such as measurements, genders, survey responses) Statistics- science of planning studies and experiments, obtaining data, and then organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data. Population- the complete collection of all individuals (scores people, measurements) to be studied; the collection is complete in sense that it includes all of individuals being studied. Census- collection of data from every member of population *all students at. Sample- subcollection of members selected from a population *a student in. An understanding of context will directly affect the statistical procedure used. Source of data: is the source objective? (clear goal?) Is the source biased? (data partial to collector?)
