Question

In: Statistics and Probability

The following contingency table shows opinion about global warming​ (nonissue vs. serious​ concern) among registered​ voters,...

The following contingency table shows opinion about global warming​ (nonissue vs. serious​ concern) among registered​ voters, broken down by political party affiliation​ (Democratic, Republican, and​ Independent). Use the table to answer​ a) through​ d) below.

Political Party Opinions on Global Warming Nonissue Serious Concern

Total

Democratic 70 430 500

Republican 290 210 500

Independent 70 130 200

Total 430 770 1200 ​

a) What is the probability that a registered voter selected at random believes that global warming is a serious​ issue?

Solutions

Expert Solution

a) P(serious issue) = 770 / 1200 = 0.6417 (ans)

                                                                                                                                                                                                                                     


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