Answer:
Median household income | Frequency | Relative Frequency
30,000 - 39,999 2 2/51 or 3.921%
40,000 - 49,999 15 15/51 or 29.411%
50,000 - 59,999 21 21/51 or 41.176%
60,000 - 69,999 12 12/51 or 23.529%
70,000 - 79,999 1 1/51 or 1.960%
Total 51 51/51 or 100%