consider the following ungrouped frequency distribution of Martial Status in two building complexes; A and B in a metropolitan city.

Martial Status Complex A Complex B

married 5 10

unmarried 8 2

single 4 6

separated 2 1

widowed 0 1

divorced 1 0

for each building complex

1. calculate the relative frequencies
2. calculate the cumulative relative frequencies
3. calculate the percentile ranks
4. what percentage of the respondents in each complex is married?
5. what proportion of each complex is widowed?
6. what percentage of the respondents that is single live in the complexes?