Inference for One Variance: An Example of a Confidence Interval and a Hypothesis Test

I work through an example of a confidence interval and a hypothesis test for a variance (using chi-square methods that are appropriate when sampling from a normally distributed population). The cereal data is from a sample of 15 bags of cereal that I collected and weighed. I have a video introduction to these procedures available at:    • An Introduction to Inference for One Varia...  

The Sampling Distribution of the Sample Variance
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The Sampling Distribution of the Sample Variance

An Introduction to Inference for the Ratio of Two Variances
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An Introduction to Inference for the Ratio of Two Variances

Confidence Interval: The right and wrong way to understand them.
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Confidence Interval: The right and wrong way to understand them.

Hypothesis Testing for Variance and Standard Deviation, Normal Distribution
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Hypothesis Testing for Variance and Standard Deviation, Normal Distribution

Inference for Two Proportions:  An Example of a Confidence Interval and a Hypothesis Test
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Inference for Two Proportions: An Example of a Confidence Interval and a Hypothesis Test

Confidence Interval for population variance
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Confidence Interval for population variance

05 - Using P-Values in Hypothesis Testing (Compare P Value to Level of Significance)
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05 - Using P-Values in Hypothesis Testing (Compare P Value to Level of Significance)

Inference for a Proportion: An Example of a Confidence Interval and a Hypothesis Test
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Inference for a Proportion: An Example of a Confidence Interval and a Hypothesis Test

F Test for Two Variances   Confidence Interval & Hypothesis Testing Explained
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F Test for Two Variances Confidence Interval & Hypothesis Testing Explained

The Professor Who Taught People How To Think (1962)
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The Professor Who Taught People How To Think (1962)

t Tests for One Mean: An Example
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t Tests for One Mean: An Example

Contingency table chi-square test | Probability and Statistics | Khan Academy
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Contingency table chi-square test | Probability and Statistics | Khan Academy

Inference for Two Variances: An Example of a Confidence Interval and a Hypothesis Test
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Inference for Two Variances: An Example of a Confidence Interval and a Hypothesis Test

Statistics: Ch 9 Hypothesis Testing (11 of 35) How Does Level of Significance Affect Testing?
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Statistics: Ch 9 Hypothesis Testing (11 of 35) How Does Level of Significance Affect Testing?

Intro to Hypothesis Testing in Statistics - Hypothesis Testing Statistics Problems & Examples
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Intro to Hypothesis Testing in Statistics - Hypothesis Testing Statistics Problems & Examples

She’s 12. She Sings Aretha Franklin… Until Simon TELLS Her to Do It Acapella! 😳
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She’s 12. She Sings Aretha Franklin… Until Simon TELLS Her to Do It Acapella! 😳

Hypothesis testing and p-values | Inferential statistics | Probability and Statistics | Khan Academy
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Hypothesis testing and p-values | Inferential statistics | Probability and Statistics | Khan Academy

t Tests for One Mean: Introduction
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t Tests for One Mean: Introduction

Train Your Brain to Never Forget (5 Feynman Habits)
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Train Your Brain to Never Forget (5 Feynman Habits)

An Introduction to Inference for One Variance (Assuming a Normally Distributed Population)
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An Introduction to Inference for One Variance (Assuming a Normally Distributed Population)