Mean alpha

Here least-squares fits to both the onsets and offsets are displayed. ClockLab reports the mean horizontal distance between the two fitted lines as 11.54 hours. The standard deviation of the onset times is 0.38 hours. Standard devation of the offset times is 0.99 hours.

Note that the image compression used on the figure here makes it look a little fuzzy. The actual figures in the ClockLab program are limited only by the screen resolution.