Table:
college diploma
university bachelor's degree

coefficient
standard error
percent effect
coefficient
standard error
percent effect

men and women combined

bottom income quintile
0.877
0.047
140.3
1.211
0.046
235.7

second income quintile
0.564
0.031
75.8
0.861
0.031
136.5

third income quintile
0.432
0.034
54.0
0.706
0.031
102.7

fourth income quintile
0.312
0.037
36.7
0.567
0.029
76.3

top income quintile
0.151
0.055
16.3
0.432
0.036
54.0

men

bottom income quintile
0.634
0.052
88.6
0.904
0.051
147.0

second income quintile
0.377
0.040
45.8
0.632
0.040
88.2

third income quintile
0.243
0.039
27.6
0.471
0.037
60.1

fourth income quintile
0.189
0.044
20.8
0.373
0.036
45.2

top income quintile
0.062
0.067
6.4
0.256
0.042
29.1

women

bottom income quintile
1.427
0.112
316.4
1.805
0.108
508.1

second income quintile
0.844
0.065
132.6
1.214
0.063
236.6

third income quintile
0.790
0.074
120.4
1.147
0.067
214.8

fourth income quintile
0.633
0.090
88.2
0.965
0.071
162.6

top income quintile
0.500
0.119
64.8
0.894
0.086
144.6

Statement: the relative premiums associated with a college diploma and a university bachelor's degree are higher for youth from lower-income families than for youth from higher-income families.
Question: which group did a college diploma and a university bachelor's degree associating with median earnings per year more,lower-income families or higher-income families?
Answer: bottom income quintile