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The Pooled-Variance t Test as a Regression

by jbstatistics on Youtube Youtube
Duration: 0.1 hours
A look at the relationship between the pooled-variance t test and simple linear regression. I illustrate how the pooled-variance t test can be done as a regression, ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

One-Sided Test or Two-Sided Test?

by jbstatistics on Youtube Youtube
Duration: 0.16 hours
A discussion of when to use a one-sided alternative hypothesis and when to use a two-sided alternative hypothesis in hypothesis testing. I assume that the ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

What Factors Affect the Power of a Z Test?

by jbstatistics on Youtube Youtube
Duration: 0.21 hours
A look at what factors influence the power of a hypothesis test. This discussion is in the setting of a one-sample Z test on the population mean, but the concepts ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

Hypothesis tests on one mean: t test or z test?

by jbstatistics on Youtube Youtube
Duration: 0.12 hours
A look at at what influences the choice of the t test or z test in one-sample hypothesis tests on the population mean mu. I work through an example of a t test, and ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

Type I Errors, Type II Errors, and the Power of the Test

by jbstatistics on Youtube Youtube
Duration: 0.14 hours
A discussion of Type I errors, Type II errors, their probabilities of occurring (alpha and beta), and the power of a hypothesis test.
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

An Example of a Paired-Difference t Test and Confidence Interval

by jbstatistics on Youtube Youtube
Duration: 0.2 hours
An example of a paired-difference t test and confidence interval. The data in this video is from: Penetar et al. (2012). The isoflavone puerarin reduces alcohol ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

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

by jbstatistics on Youtube Youtube
Duration: 0.14 hours
I work through an example of a confidence interval and a hypothesis test for a single proportion, using normal approximation methods (Z test and confidence ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

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

by jbstatistics on Youtube Youtube
Duration: 0.22 hours
I work through an example of a confidence interval and a hypothesis test for the difference in population proportions (based on the normal approximation).
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

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

by jbstatistics on Youtube Youtube
Duration: 0.2 hours
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 ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...

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

by jbstatistics on Youtube Youtube
Duration: 0.17 hours
I work through an example of a confidence interval and a hypothesis test for the ratio of population variances, using F procedures that are based on the ...
  
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Jeremy Balka's statistics channel, containing some introductory statistics videos. (I am an as...
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