Chapter 13 - Section 13.2 - Consumer Reports - Tea Antioxidants: An Unexpected Side Benefit to a Cheap and Tasty Beverage - Page 645: c

Yes, there is a statistical difference between some brands. $α=0.05$

We can conclude, by the given results, that brands 1 and 2 have different ORAC levels. Given that we have 95% cofidence intervals: $level~of~confidence=(1-α).100$% $95$% $=(1-α).100$% $0.95=1-α$ $α=0.05$