Sampling - Populationsv.Samples Sampling 2.28.2011

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Sampling 2.28.2011 Populations v. Samples The entire universe of possible units is called the population . A subset of the population is called the sample . The subset is made up of observations or elements or units. More Jargon… population parameter characteristic of the population that you want to know. estimato or sample statisti estimator statistic measured value of the p.p. wears a hat ^ What we want What we get Population Sample Parameter Estimator Population Sampling Frame Sample Sample Bias Occurs when sampling frame is incomplete or inappropriate. Means that our estimator may not reflect the population parameter: sampling error or bia population parameter: sampling error or bias . Example: President Alf Landon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Types of Samples probability samples : Each element has a known probability of being included in the sample. Allows us to calculate how accurately sample represents
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/06/2011 for the course POLI 301 taught by Professor Mcatee during the Spring '11 term at South Carolina.

Page1 / 3

Sampling - Populationsv.Samples Sampling 2.28.2011

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online