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Determination of Sample Size: A Review of Statistical Theory Chapter 13 Sample v. Population Inferential Descriptive Sample statistics Population parameters Tables Frequency distribution Percentage distribution Probability Proportion Measures of Central Tendency Mean Median Mode Measures of Dispersion Range – Formula Deviation (Variance) – Formula Standard – Formula Deviation The Normal Distribution Three Characteristics Standardized Normal Distribution – Why do I have to know this? – What does it mean? – Variable – Formula – Example Population Distribution, Sample Distribution, and Sampling Distribution Population: Sample: Sampling µ ơ S Distribution – Standard Error of the Mean – Symbol – Formula Central Limit Theorem As sample size increases, the distribution of the mean, of any sample approaches a normal distribution. Estimation of Parameters Point Estimates – What is it? Confidence Intervals – Question #10, page 343 Sample Size for Means Sample Error – Formula – Factors Variance Magnitude of error (confidence interval) Confidence level Sample Size for Means Formula Question #11 page 343 Question #12 page 343 Sample Size for Proportions Standard Error for Proportion – Formula Confidence interval – Formula Sample Size – Formula