Healing A medical researcher suspects that giving postsurgical patients large doses of vitamin E will speed their recovery times by helping their incisions heal more quickly. Design an experiment to test this conjecture. Be sure to identify the factors, levels, treatments, response variable, and the role of randomization.

STAT-5615: Statistics in Research I Lecture 9 Two Sample Paired t-test Ott & Longnecker 6.4 Dr. Christian Lucero Virginia Tech Fall 2016 Comparison of Paired Samples There are many situations in which the populations that we are comparing are not independent of one another. This is a violation of one of our assumptions that we have been using for independent samples t-test to compare the means of two di▯erent populations. If the two groups that we are comparing are now related in some way, and we are able to match an observational unit in the ▯rst population with a corresponding observational unit in the second group, then we can still make comparisons. In this