# What day of the week were you born on? **URL:** \ **Category:** In My Humble Opinion\ **Created:** [September 25, 2012, 1:09am UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729 "2012-09-25T01:09:53Z")\ **Posts on this page:** 7\ **Page:** 5
**Author:** ![TreacherousCretin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/treacherouscretin/32/476_2.png) [@TreacherousCretin](https://boards.straightdope.com/u/TreacherousCretin)\ **Post date:** [September 30, 2012, 3:35am UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/81 "2012-09-30T03:35:57Z")
Friday. The day after Thanksgiving, 1950. ---
**Author:** ![BigT](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bigt/32/12044_2.png) [@BigT](https://boards.straightdope.com/u/BigT)\ **Post date:** [September 30, 2012, 11:07am UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/82 "2012-09-30T11:07:24Z")
My sister and I are 3 years and 3 days apart, and both of us were born on a Saturday. I was born a couple weeks early, she a few days late, as she was supposed to actually be born on my birthday. ---
**Author:** ![Maserschmidt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/maserschmidt/32/18829_2.png) [@Maserschmidt](https://boards.straightdope.com/u/Maserschmidt)\ **Post date:** [September 30, 2012, 11:52am UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/83 "2012-09-30T11:52:47Z")
> [@Leaffan](#): > > OK. We’ve got a serious statistical anomaly here with Mondays. We need to get to the bottom of this. > > Doctors? > > Nurses? Planned deliveries have certainly created a distinct profile in more recent years, but presumably there were fewer of those back when many Dopers were born. [http://peltiertech.com/Excel/Commentary/BirthsByDayOfYear.html](http://peltiertech.com/Excel/Commentary/BirthsByDayOfYear.html) ---
**Author:** ![Bullitt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bullitt/32/5725_2.png) [@Bullitt](https://boards.straightdope.com/u/Bullitt)\ **Post date:** [October 3, 2012, 5:17pm UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/84 "2012-10-03T17:17:46Z")
Thursday. I have far to go, I guess. ---
**Author:** ![John\_DiFool](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/john_difool/32/19543_2.png) [@John\_DiFool](https://boards.straightdope.com/u/John_DiFool)\ **Post date:** [October 3, 2012, 6:00pm UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/85 "2012-10-03T18:00:59Z")
Anyone care to do a significance test or such on Mondays in our sample? Anyone else care to proffer a hypothesis to explain it? ---
**Author:** ![Simple\_Linctus](https://avatars.discourse-cdn.com/v4/letter/s/9f8e36/32.png) [@Simple\_Linctus](https://boards.straightdope.com/u/Simple_Linctus)\ **Post date:** [October 3, 2012, 8:24pm UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/86 "2012-10-03T20:24:37Z")
Ok according to [Chi-square Calculator](http://graphpad.com/quickcalcs/chisquared2/) IF I’VE DONE EVERYTHING CORRECTLY INCLUDING NOT ONLY DATA ENTRY BUT ALSO SELECTING THE APPROPRIATE TEST TO DO ETC P value and statistical significance: Chi squared equals 10.843 with 6 degrees of freedom. The two-tailed P value equals 0.0933 By conventional criteria, this difference is considered to be not quite statistically significant. In other words if you were happy to take a 90% chance of there being a statistical difference, then there would be one. But we cannot say it’s statistically significant at 95% or higher confidence. This was done when there were 249 non-other answers. ---
**Author:** ![Simple\_Linctus](https://avatars.discourse-cdn.com/v4/letter/s/9f8e36/32.png) [@Simple\_Linctus](https://boards.straightdope.com/u/Simple_Linctus)\ **Post date:** [October 3, 2012, 8:29pm UTC](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729/87 "2012-10-03T20:29:15Z")
(Of course there don’t have to be more births on Monday for this phenomena to exist. It could be that doctors are all hungover on Monday mornings! :D) [Previous page](https://boards.straightdope.com/t/what-day-of-the-week-were-you-born-on/635729.md?page=4)