University of Bristol3 年
From population to sample
On watching this video, students should be able to: Confirm that that aspects of good study design include defining the research question, defining the target population, and using an appropriate ...
Simon Fraser University7 年
Example 61.1: Stratified Cluster Sample Design
Consider the example in the section "Stratified Sampling". The study population is a junior high school with a total of 4,000 students in grades 7, 8, and 9. Researchers want to know how much these ...
University of Bristol3 年
4 Ideas of statistical inference
The long run behavior of a 95% confidence interval is such that we’d expect 95% of the confidence intervals estimated from repeated independent sampling to contain the true population parameter.The ...
Simon Fraser University1 年
Two-Sample z-Test for Population Proportions
This web calculator conducts a z-test for the difference between two populations' proportions. The calculator includes an explanation of inputs and outputs. This web calculator conducts a z-test for ...