On Wed, Feb 06, 2008 at 12:31:06PM -0500, Rich Felker wrote: > mean difference between dts and receipt_time will be 0.45 for the > first 10 frame window, 1.45 for the second 10 frame window, etc. This Obviously I forgot to divide by 10 in writing the means. :) They should be 0.045 and 0.145 respectively, of course. Rich