In a particular survey of internet​ users, 3616 respondents say that they use social networking sites and 1464 respondents say that they do not use social networking sites. What is the probability that a randomly selected person uses a social networking​ site? Does that result suggest that it is likely​ (with a probability of 0.5 or​ greater) for someone to use social networking​ sites?

Estimates from the American Diabetes Association suggest that 10% of the American population has diabetes. According to recent research,[1] the prevalence of smoking is 25.7% among individuals with diabetes, and 24.1% among individuals without diabetes. If a smoker is selected at random, what is the probability that the individual has diabetes? What is the probability that a non-smoking individual actually does not have diabetes?

Based on a​ poll, 67​% of Internet users are more careful about personal information when using a public​ Wi-Fi hotspot. What is the probability that among three randomly selected Internet​ users, at least one is more careful about personal information when using a public​Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to​ respond?

The College Board reports that 2 % of the 2 million high school students who take the SAT each year receive special accommodations because of documented disabilities (Los Angeles Times, July 16, 2002). Consider a random sample of 25 students who have recently taken the test. a. What is the probability that exactly I received a special accommodation? b. What is the probability that at least 1 received a special accommodation? c. What is the probability that at least 2 received a special accommodation? d. What is the probability that the number among the 25 who received a special accommodation is within 2 standard deviations of the number you would expect to be accommodated? e. Suppose that a student who does not receive a special accommodation is allowed 3 hours for the exam, whereas an accommodated student is allowed 4.5 hours. What would you expect the average time allowed the 25 selected students to be?

80% of U.S. drivers over the age of 30 have had a speeding ticket and 55% of those have also been in an accident while behind the wheel. What is the probability that a randomly selected US driver over the age of 30 has had a speeding ticket and also been in an accident while behind the wheel?

Research by the Pew Research Center In 2008 shows that 71% of American teens own a cell phone and 74% own an mp3 player. Suppose 60% own both. What is the probability that an American teen... Round to the nearest hundredth. b. owns either a cell phone or an mp3 player. type your answer... c. owns neither a cell phone nor an mp3 player. type your answer.... d. owns an mp3 player but not a cell phone. type your answer.... Previous ↓ Next

What is the probability that a randomly selected participant tasted apples and preferred non-organic?

9.1% of 16-17-year-olds drop out of high school. In addition, 5.8% of White 16-17 year-olds drop out of high school. What is the probability a randomly selected dropout is White, given that he or she is 16-17 years old?

A pew research center survey asked adults in the United States which technology would be very hard to give up. The following responses were obtained internet 70% smart phone 60% email 30% and land line 25%. If 20 adults internet uses are surveyed what is the probability that 3 users will report that it would be very hard to give up?

A study showed that in​ 1990, 47​% of all those involved in a fatal car crash wore seat belts. Of those in a fatal crash who wore seat​ belts, 46​% were injured and 26​% were killed. For those not wearing seat​ belts, the comparable figures were 43​% and 51​%, respectively. Find the probability that a randomly selected person who was unharmed in a fatal crash was not wearing a seat belt.