For the data of Exercise 10.3.10, test at the 0.05 level that the true income lower limits of the top 5% of US households for each race are the same for all 5 years. Also, test at the 0.05 level that the true income lower limits of the top 5% of US households for each year between 1994 and 1998 are the same.
Exercise 10.3.10
Table 10.3.6 gives lower limits of income (approximated to the nearest $1000 and calculated as of March of the following year) of the top 5% of US households by race from 1994 to 1998 (Source: US Census Bureau).
Table 10.3.6

Year 1994 110 113 Race 1996 120 123 1997 127 130 1998 132 136 1995 113 All Races White Black Hispanic 80 80