Based on a random sample of 1066 adults (18 years or older), a Harris Poll (July

Question

Based on a random sample of 1066 adults (18 years or older), a Harris Poll (July 13-18, 2010) estimates that 175 million U.S. adults have gone online for health information. Such individuals have been labeled as "cyberchondriacs." Cyberchondriacs in the sample were asked about the success of their online search for information about health topics. Here is the distribution of responses: Very Somewhat successfu successfu or unsuccessful Neither successful Probability 0.41 0.45 0.04 Somewhat Very Decline unsuccessful unsuccessful to answer Probability005 0.03 0.02 What is the probability that a randomly chosen cyberchondriac feels that his or her search for health information was somewhat or very successful? (Fill in the blank below and give your answer to 2 decimal places.) The probability is

Explanation / Answer

Probability that a randomly chosen cyberchondriac feels thats his or her search for health information was somewhat or very successful = P(somewhat successful) + P(very successful)

= 0.05 + 0.03

= 0.08

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