The SPSS Windows and Files. SPSS Statistics has three main windows, plus a menu bar at the top. These allow you to (1) see your data, (2) see your statistical output, and (3) see any programming commands you have written. Each window corresponds to a separate type of SPSS file.
He found green tea to be the most potent antioxidant, followed by oolong tea, then black tea. Green tea blocked oxidation by almost 100% over 40 days. Oolong tea blocked oxidation by 50% over 15 days. Black tea showed only slight antioxidant activities.
No one knows. The studies suggesting health benefits have looked at people who drink a lot of regular tea, not decaf. The benefits apparently come from antioxidant compounds called flavonoids. Decaf tea generally contains less of these, though flavonoid content varies widely among teas, so it is hard to predict.