how to determine when paired a n set of twins is placebo how do you find the time and time difference in x for a paired and two paired study? do paired studies have two timepoints how to analyze paired pairs and timepoints in a t-test why do we need to measure time between timepoints how to analyze two-way pair analysis how do you test for two pairs of twins on the same drug at two time points? how should paired subjects be matched how do you test for pairing in statistics when do paired subjects test how to analyze data that has 2x pairings paired test when two subjects are randomly assigned why do you manually measure the difference between drug and placebo how to measure the difference between placebo and drug how to analyze data for two times pairing why do you do 2x pairing in paired tests why is it necessary to use paired t test when do you manually calculate the difference between x and z how to do paired pairs how do you calculate the difference between a drug and a placebo