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STAT1051_inference_lesson1(1)

STAT1051_inference_lesson1(1) - Chapter 6 Confidence...

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Chapter 6 Confidence Intervals

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2 Contents Notations Statistical Inference Confidence Interval For Population Mean Large Sample Small Sample Confidence Interval For Proportion Large Sample Sample Size Determination
3 Inferential Statistics INFERENTIAL STATISTICS involves the use of sample data to make inferences about the population from which the sample was chosen.

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4 Basic Definitions PARAMETER Numerical descriptive measure of some characteristic of the population. For Example, Population mean μ . SAMPLE STATISTIC Numerical descriptive measure of the sample. For Example, Sample mean and sample variance.
5 The Inference Process Population parameters Calculating Statistics Population Mean μ ( unknown) s x , Inference ( estimate) Sampling Sample

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6 Statistical Inference There are three types of inference: Statistical Inference 1. Point Estimation 3. Hypothesis Testing 2. Interval Estimation
7 Three Types POINT ESTIMATION: Based on a sample, find a single value that estimates the population parameter.

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STAT1051_inference_lesson1(1) - Chapter 6 Confidence...

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