Inference for Two Means: Introduction @jbstatistics

Uploaded June 2013 | Updated September 2026, 2 hours ago

I introduce inference procedures for the difference between two means in the case where the population standard deviations are known. I discuss the sampling distribution of the difference in the sample means, and discuss the confidence interval formula and the hypothesis test of the equality of population means.

The empathy/young offender data is simulated data with the same summary statistics as found in:

Owen, T., Fox, S. (2011). Experiences of shame and empathy in violent and non-violent young offenders. The Journal of Forensic Psychiatry & Psychology, 22(4):551-563.

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The Poisson Distribution: Introduction (fast version)

Finding Percentiles Using the Standard Normal Table (for tables that give the area to left of z)

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Basics of Probability: Unions, Intersections, and Complements

The Hypergeometric Distribution: An Introduction (fast version)

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