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Published byMarylou Daniel Modified over 9 years ago
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Types of Control I. Measurement Control III. Experimental Control II. Statistical Control (Reliability and Validity) (Internal Validity) (External Validity)
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I The Vocabulary of Sampling Statistical Control - Sampling II Types of Samples III Determining Sample Size
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I. The Vocabulary of Sampling Statistical Control- Sampling A. The Universe(The Theoretical Concept) B. The Population(The Indicator Concept) C. The Sampling Frame(The Operational Procedure) D. The Sample(The Observational Set)
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Statistical Control- Sampling II. Types of Samples A. Non-Probability B. Probability
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Statistical Control- Sampling II. Types of Samples A. Non-Probability 1. Convenience Sampling 2. Referral Sampling 3. Quota Sampling (Good for Exploratory Research)
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Statistical Control- Sampling II. Types of Samples B. Probability 1. Simple Random Sample 2. Systematic Random Sample 3. Stratified Random Sample 4. Cluster or Area Sample (Good for Explanatory Research)
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IV. Sample Size Statistical Control- Sampling A. Error in Prediction (Three Components) B. Confidence Level C. Variability in Population
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Determining Sample Size Observe now the three parentheses that define N: 1) our confidence level (z); 2) the population variance; and 3) the margin of error. Consider the confidence interval Solving for the sample size N we get IfThen
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