[ihaveajob]

Your margin of error is 4.38% [1], which makes the comparison between all non-Saturday meaningless. However, it seems like the numbers for Saturday vs other days are useful.

To answer your specific question, if you had 10x more data, your margin of error (with 95% confidence) would drop to 1.39%, so yes, you could reasonably get fairly different results.

I was disappointed to read that you skipped Thursday and Friday. In my domain, Mondays are the peak of activity, slowly sliding down to a bottom on Friday/Saturday. I would have liked to see your numbers for every day. Next time! (In that case, your MoE would have been 5.37%, btw.)

[1] http://americanresearchgroup.com/moe.html

[latitude]

I am too very curious about Fridays, but I suspect it would require getting the time of the day right too. Send it too early, and it's pre-weekend morning stress. Too late - and everyone's already gone for the day.

PS. I don't know why I picked (mod 5). Makes zero sense now.