Problem Statement 8: A sample of 300 adults is selected. The contingency table b

Question

Problem Statement 8:

A sample of 300 adults is selected. The contingency table below shows their registration status and their preferred source of information on current events.

Referring to Problem Statement 8, if an adult is selected at random, what is the probability that he/she is a registered voter?

Referring to Problem Statement 8, if an adult is selected at random, what is the probability that he/she is a registered voter who does not prefer to get his/her current information from the internet?

Explanation / Answer

Here the contigency table is

Referring to Problem Statement 8, if an adult is selected at random, what is the probability that he/she is a registered voter?

= 156/300 = 0.52

Referring to Problem Statement 8, if an adult is selected at random, what is the probability that he/she is a registered voter who does not prefer to get his/her current information from the internet?

= (156- 36)/300 = 0.40

TV Newspaper Radio Internet Total Registered 45 30 45 36 156 Not Registered 35 44 45 20 144 total 80 74 90 56 300

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