Contingency Tables · Exercise 18

Use the information in the to answer the next eight exercises. The table shows the political party affiliation for various members of the U.S. Senate during two separate years when they are up for reelection.
$$\begin{array}{ccccc}\text{Up for reelection:}& \text{Democratic Party}& \text{Republican Party}& \text{Other}& \text{Total}\\ \text{Year A}& \text{20}& \text{13}& \text{0}& \\ \text{Year B}& \text{10}& \text{24}& \text{0}& \\ \text{Total}& & & & \end{array}$$

The events “Republican” and “Up for reelection in Year B” are ________

(a) mutually exclusive.
(b) independent.
(c) both mutually exclusive and independent.
(d) neither mutually exclusive nor independent.

OpenStax, Introductory Statistics 2e · §3.4 Contingency Tables · Exercise 18