Ch 7 - Comm 392 Study Guides Chapter 7 Sampling,...

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Comm 392 – Study Guides Chapter 7 – Sampling, Significance Levels, and Hypothesis Testing 1. What is the difference between a sampling frame and a population? a. Frame-Simply a list of available units from the population you intend to study b. Population-The membership of the entire group you are studying 2. What is generalizability? a. The extent to which conclusions developed form data collected from a sample can be applied to the population in question b. The extent to which the sample is representative 3. How can representativeness be ensured?-   usually done through random sampling 4. What is the relationship between a sampling error, confidence level, and confidence interval? a. Sampling error: the degree to which a sample differs from population characteristics on some measurement; as sample size becomes a larger proportion of the population, sampling error is reduced b. Confidence level: degree of accuracy in predicting the result for a population from a sample c. Confidence interval: the range of confidence in your results (+/- 5%)
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This note was uploaded on 01/26/2011 for the course COMM 392 taught by Professor Amanda during the Spring '10 term at Truman State.

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Ch 7 - Comm 392 Study Guides Chapter 7 Sampling,...

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