Uploaded May 2012 | Updated September 2026, 2 hours ago
I discuss the sampling distribution of the difference in sample proportions, and the formulas for confidence intervals and hypothesis tests for the difference in population proportions, based on the normal approximation.
This video does not do an example of the calculations (those are carried out in the video: Inference for Two Proportions: An Example).
The birth weight data is found in:
Shiono et al (1991). The impact of cocaine and marijuana use on low birth
weight and preterm birth: A multicenter study. American Journal of Obstetrics and Gynecology, 172:19--27.
I discuss the sampling distribution of the difference in sample proportions, and the formulas for confidence intervals and hypothesis tests for the difference in population proportions, based on the normal approximation.
This video does not do an example of the calculations (those are carried out in the video: Inference for Two Proportions: An Example).
The birth weight data is found in:
Shiono et al (1991). The impact of cocaine and marijuana use on low birth
weight and preterm birth: A multicenter study. American Journal of Obstetrics and Gynecology, 172:19--27.
