A sample of people is selected. The people sampled are classified according to their place of residence and the highest educational degree that they have earned. The results are given in the contingency table below.
Highest degree earned
No college degree Two-year degree Four-year degree Advanced degree
Place of residence Urban 31 48 16 39
Suburban 26 23 42 31
Rural 19 50 36 15

Question

A sample of  people is selected. The people sampled are classified according to their place of residence and the highest educational degree that they have earned. The results are given in the contingency table below.
Highest degree earned
No college degree	Two-year degree	Four-year degree	Advanced degree
Place of residence	Urban	31	48	16	39
Suburban	26	23	42	31
Rural	19	50	36	15

anonymous · Answer

Among the people in the sample whose place of residence is urban, what is the relative frequency of those who do not have a college degree?

anonymous · Answer

Do I just take 31 and divide by the total number of people living in the urban area?

michele_laino · Answer

the requested frequency is given by the subsequent ratio:
$$\Large  \frac{{31}}{{31 + 48 + 16 + 39}} = ...?$$

michele_laino · Answer

so, your guess is right!

anonymous · Answer

thanks so much for your help!