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Chapter 9: Confidence Intervals

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Estimating parameters with points and intervals
Erin Vales
Flashcards by Erin Vales, updated more than 1 year ago
Erin Vales
Created by Erin Vales about 7 years ago
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Inferential Statistics objective to make statements about population parameters based on statistics computed from a sample
Estimate
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Confidence Interval
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Assumptions with Confidence Intervals for Population Mean (when population standard deviation is known)
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Interpretation of Confidence Intervals for Population Mean (when population standard deviation is known)
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Confidence Interval for Population Mean Example (1) **population standard deviation KNOWN**
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Obtaining precise interval for High Confidence
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Choosing a sample size
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Choosing a sample size Example
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Student's t distribution used when population standard deviation is UNKNOWN
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Student's t distribution (cont.)
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Confidence Interval for Population Mean **when population standard deviation is UNKNOWN**
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Confidence Interval for Population Mean Example (1) **when population standard deviation is UNKNOWN**
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Confidence Interval for Population Proportion (pi)
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Confidence Interval for Population Proportion (pi) Example (1)
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Confidence Interval for Population Proportion (pi) Example (1) (cont.)
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Choosing the Sample Size Confidence Interval for Population Proportion (pi)
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Choosing the Sample Size Confidence Interval for Population Proportion (pi) Example (2)
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