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Chapter 3: Q. 70 (page 221)

Use the following information to answer the next 12exercises. The graph shown is based on more than 1,70,000interviews done by Gallup that took place from January through December 2012. The sample consists of employed Americans 18years of age or older. The Emotional Health Index Scores are the sample space. We randomly sample one Emotional Health Index Score.

Find the probability that an Emotional Health Index Score is more than 81?

Short Answer

Expert verified

The probability that an Emotional Health Index Score is more than 81is 0.5.

Step by step solution

01

Given information

Given the Emotional Health Index Score

02

Explanation

We are assuming that all occupations are equally likely to occur while doing a random sample. Let A be the probability that an Emotional Health Index Score is more than 81. From the graph, there are seven occupations (Farming, Fishing or forestry, teacher, physician, professional, nurse, business owner and managing, executive or officials) shown whose Emotional Health Index Score is more than 81. So, the probability of A:

localid="1648751487048" PA=No. of favourable outcomeTotal no. of outcomePA=714PA=12PA=0.5

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C = California registered voters who support same-sex marriage. 鈥� B = California registered voters who say the Supreme Court鈥檚 ruling about the constitutionality of California鈥檚 Proposition 8 is very or somewhat important to them 鈥� A = California registered voters who are 18to39years old.

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