1_intro_sampling

1_intro_sampling - Introduction to Sampling Lecture 1 STAT...

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Introduction to Sampling Lecture 1 STAT 651: Survey Sampling Methods, Kaizar – p.1/23
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Lecture 1: Intro to Sampling Reading: Chapter 1, Sections 1, 2, 3, 6 Sampling: what, why and how? Survey structure and vocabulary Samples vs. Experiments Legal and Ethical obligations STAT 651: Survey Sampling Methods, Kaizar – p.2/23
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Sampling: What? From Merriam-Webster Online Dictionary: Sam · ple 1: a representative part or a single item from a larger whole or group especially when presented for inspection or shown as evidence of quality. 2: a finite part of a statistical population whose properties are studied to gain information about the whole. 3: an excerpt from a musical recording that is used in another artist’s recording STAT 651: Survey Sampling Methods, Kaizar – p.3/23
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Sampling: What? Powered by glowing, super-heated gas as it swirls into black holes a billion times more massive than the sun, quasars are the most brilliantly luminous objects in the universe. But a new study from the Sloan Digital Sky Survey (SDSS-II) shows that many of the most energetic quasars are hidden from our view by clouds of gas and dust that block the central black hole. ... Surveys sensitive to infrared and X-ray emissions had shown that the visible light from the less energetic quasars is often obscured by dust, making them hard to identify with regular astronomical telescopes. ... “We found that hidden quasars make up at least half of the quasars in the relatively recent Universe, implying that most of the powerful black holes in our neighborhood had previously been unrecognized.” http://www.sdss.org/news/releases/20080109.blackholes.html STAT 651: Survey Sampling Methods, Kaizar – p.4/23
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Sampling: Why? Cork industry audit shows decline in tainted corks
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This note was uploaded on 07/26/2011 for the course STA 651 taught by Professor Kaizar during the Winter '11 term at Ohio State.

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1_intro_sampling - Introduction to Sampling Lecture 1 STAT...

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