Question

A sample of 394 people is selected. The people are classified according to place of residence ("urban", "suburban", or "rural"). They are also classified accordingto highest educational degree earned ("no college degree", "two-year degree", "Your-year degree", or "advanced degree“). The results are given in thecontingency table below.No college degree Two-year degree Four-year degree Advanced degreeUrban50152045Suburban23481543Rural46272240

Answer 1

$\begin{gathered} \text{ Relative frequency=}\frac{class\text{ frequency}}{n} \\ \\ \text{ class frequency: \# observations in a especific class} \\ n\colon\text{ total number of observations} \end{gathered}$

Class: Place of residence is rural

Class frequency: (46+27+22+40) =135

n: 394 people is selected

Relative frequecy of people in the sample whose place of residence is rural:

$=\frac{135}{394}\approx0.34$