Marital (and other) statistic about Cincinnati campus population.

Today I decided to make some statistical investigation about our group.
All members of the group live in our Cincinnati "campus".

There are 13 people in the group.
There are 12 Russians and 1 American (Vincent) in the group.
100% Russians in the group are programmers.
100% Americans in the group are businessmen.

75% Russians are married and have children.
25% Russians are single.
0% Russians is divorced.
100% Americans are single.

There are 12 males and 1 female in our group.
67% males are married and have children.
100% females are single.

Detailed males statistic:
12 males in the group belong to two age groups:
- Group30 (26-34 years old) - 8 men.
- Group40 (37-44 years old) - 4 men.

100% men in Group30 are married and have children.
25% men in Group40 are married and have children.
75% men in Group40 are single and don’t have children.