๐ŸŽ‚ Birthday Paradox ยท Sports
โ† All sports

Olympic Cross Country Skiing (Skiing)

Delegation

359 team lists ยท 3,435 player entries ยท avg team size 9.6

Read this sport as a comparison between raw coincidence and what team size alone predicts. Here, the real rate is +1.6 points above the birthday-paradox baseline.

Real team lists
13.4%
teams with shared birthdays
Why it matters: This is the headline rate, but it should never be read without team size.
Expected from size
11.8%
from avg team size
Why it matters: This is the fair baseline: what same-size random teams would do.
Gap from expected
+1.6 points
real โˆ’ expected
Why it matters: Positive means the sport has more birthday matches than size alone predicts.
Team lists
359
teams analysed
Why it matters: Enough team lists for a useful sport-level read.
What to notice: The best question on a sport page is not "is the real rate high?" but "is it high after accounting for team size?" That is what the gap card is answering.

Country comparison

Countries with the most team lists for Olympic Cross Country Skiing (Skiing), charted by the share of teams with at least one shared birthday.

What to compare: This view is best for spotting sample-shape differences inside a sport. Among the highest-sample countries, CAN has the highest observed rate, with an average team size of 9.5.

Gender split inside this sport

Real and expected rates for labelled team lists in this sport.

Why it matters: The gender gap is mostly a team-size story. Women have the larger average team size here (10.3 athletes), so their birthday-match rate naturally rises.

By country

Top 40 countries by team-list count.

CountryTeam listsAvg playersReal
NOR2511.812.0%
ITA2411.04.2%
FIN2411.916.7%
SWE2411.320.8%
SUI239.30.0%
USA2111.023.8%
FRA208.75.0%
GER1610.618.8%
POL166.90.0%
AUT157.313.3%
CAN139.553.8%
TCH137.80.0%
JPN108.110.0%
CZE910.022.2%
EST99.011.1%
URS911.622.2%
KAZ810.90.0%
BLR78.728.6%
RUS715.042.9%
FRG68.00.0%
SVK65.533.3%
GDR68.30.0%
YUG57.20.0%
BUL55.420.0%
SLO55.80.0%
UKR58.80.0%
CHN411.00.0%
KOR35.00.0%
LAT35.00.0%
GBR39.00.0%
AUS26.00.0%
ARG25.00.0%
ROC214.00.0%
ROU27.550.0%
ESP25.0100.0%
EUN112.00.0%
LIE15.00.0%
ISL16.00.0%
MGL16.00.0%
TUR15.00.0%
What to notice: Countries with larger average teams will naturally show more shared birthdays. The country list is most useful for finding which samples are driving this sport's overall rate.

By gender

Where the dataset records it.

GenderTeam listsRealExpectedGap
Women22814.9%13.5%+1.5 points
Men13110.7%8.9%+1.8 points

Sample team lists

Largest teams in the dataset.

TeamSeasonPlayersRepeatsExpected chance
RUS Cross Country Skiing (Skiing) (2010 Winter) ยท RUS2010 Winter19137.9%
RUS Cross Country Skiing (Skiing) (2014 Winter) ยท RUS2014 Winter19137.9%
RUS Cross Country Skiing (Skiing) (2006 Winter) ยท RUS2006 Winter18334.7%
USA Cross Country Skiing (Skiing) (1992 Winter) ยท USA1992 Winter17131.5%
FIN Cross Country Skiing (Skiing) (2010 Winter) ยท FIN2010 Winter17131.5%
USA Cross Country Skiing (Skiing) (1994 Winter) ยท USA1994 Winter16128.4%
SWE Cross Country Skiing (Skiing) (2014 Winter) ยท SWE2014 Winter16128.4%
USA Cross Country Skiing (Skiing) (2002 Winter) ยท USA2002 Winter15225.3%
USA Cross Country Skiing (Skiing) (2006 Winter) ยท USA2006 Winter15125.3%
GER Cross Country Skiing (Skiing) (2014 Winter) ยท GER2014 Winter15225.3%
What to notice: The sample team lists show the mechanics: once the player count gets large, the expected chance climbs quickly, and each repeat is another player landing on a date already present.