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ch13 - Chapter 13 Determination of Sample Size A review of...

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Chapter 13- Determination of Sample Size: A review of Statistical Theory Learning Outcomes: 1. Use descriptive statistics indicating central tendency and dispersion to make inferences about a population. 2. Distinguish among population, sample, and sampling distributions. 3. Explain the central-limit theorem. 4. Use confidence intervals to express population estimates. 5. Understand the major issues in specifying sample size. Some Statistics- Related Terminology o Descriptive Statistics- describe the distribution of responses on a variable; measures of central tendency; measures of dispersion. o Inferential Statistics- collected using a probability sample of the population of interest; used to make inferences about the population of interest in properly collected. o Sample Statistics- variables in a sample or measures computed from sample data; computed from sample data; used to describe the population elements making up the sample. o Population Parameters- variables in a population or measured characteristics of the population; measure of the population of interest. o Some More Statistics-Related Terminology o Normal Distribution- a symmetrical, bell shaped distribution that describes the expected probability distribution of many chance occurrences. o

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ch13 - Chapter 13 Determination of Sample Size A review of...

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