STAT151 Chapter Notes - Chapter 20: Probability Plot, Confidence Interval, Standard Deviation

• School: University of Alberta
• Department: Statistics
• Course: STAT151
• Professor: Rosana Fok

Document Summary

Are naturally related to observations in the other group. When the observations are collected in pairs or the observations in one group. When pairs arise from an experiment. When pairs arise from an observational study. To decide if the data are paired, consider how they were collected and what they mean. Once we know the data are paired, we can examine the pairwise differences. Because it is the differences we care about , we treat them as if they were the data and ignore. Now that we only have one set of data to consider, we can return to a simple one-sample the original 2 sets of data t-test y1-1 and y2-1 are paired yd1 = y1-1 - y2-1. Is the mean of the pairwise differences. Sd is the standard deviation of the pairwise differences. The differences must be independent of each other.