Sally is interested in finding out if the political party afliliation of America

Question

Sally is interested in finding out if the political party afliliation of Americans who are registered to vote is related to whether or not they believe in ghosts. Suppose she finds that, among all Americans who are registered to vote, 31.7% are registered Democrats and 27.6% are registered Republicans. Among all registered American voters, the percent of people who are Democrat and who believe in ghosts is 7.0%, the percent of people who are Republicans and who believe in ghosts is 6.1%, and the percent of people who affiliate with other political parties and who believe in ghosts is 90% Label each branch of the tree diagram with the correct probability value. Political party affiliation Believes in ghosts 0.070 Democrat No 0.317 Yes 0.061 0.276 Republican No 0.407 Yes 0.090 Other No Answer Bank 0.779 0.930 0.221 0.317 0.276 0.215 0.910 0.070 0.247 0.061 0.407 0.939 0.090

Explanation / Answer

here as sum on node for each branch should be equal to coresponding probability.

hence from top

1st blank: Democrat and not believe in Ghost =0.317-0.070=0.247

2nd blank :republic and not believe in Ghost =0.276-0.061=0.215

3rd blank : Other and not believe in Ghost =0.407-0.090 =0.317

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