A marketing firm would like to test-market the name of a new energy drink targeted at 18- to29-year-olds via social media. Suppose a study found that 36% of adults (18 and older) do notuse social media. Suppose the percentage of adults age 30 and older is 75%. Suppose that thepercentage of the adult population that is either age 18-29 or uses social media is 64%.What is the probability that a randomly selected adult is 18-29 and a user of social media?Your answer should be expressed as a number between 0 and 1, and it has to contain 2decimal places.

From the provided information, 36% of adults (18 and older) do not use social media. The percentage…

Answered: A marketing firm would like to…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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According to the Center for Disease Control (CDC), the percentage of boys who are diagnosed with autism by the age of 8 is 2.7%. If 150 boys under the age of 8 are randomly selected, find the probability that the average of them being diagnosed with autism is more than 2.5%.
An organization conducts an annual survey of cybersecurity at firms from around the world. In a recent year, the organization sent survey questionnaires via email to all professionals that hold a certified information security manager designation. Of the 1,401 firms that responded to the survey, 1,107 (or 79 %) expect to experience a cyberattack (for example, aMalware, hacking, or phishing attack) during the year. You are to estimate the probability of an expected cyberattack at a firm during the year with a 95% confidence interval. Answer the followings: a. b. C. d. What is/are the critical value(s)? What is the margin of error? Identify the 95% confidence interval for the probability of an expected cyberattack at a firm during the year. If the margin of error should be 0.02 or less, what would be the minimum sample size?
A construction company wants to understand how important safety helmets are on their worksite. They find that around 73% of their workers wear safety helmets regularly. Of those who wear these helmets, only 14% report any head injuries; for those who do not wear them regularly, 52% report head injuries. What is the probability that a person who has reported a head injury was wearing a helmet?
An economics professional body estimates that 80% of the students taking undergraduate economics courses are in favour of studying of statistics as part of their studies. If this estimate is correct, what is the probability that more than 790 undergraduate economics students out of a random sample of 1000 will be in favour of studying statistics?
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?
A survey showed that 76% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 14 adults are randomly selected, find the probability that at least 13 of them need correction for their eyesight. Is 13 a significantly high number of adults requiring eyesight correction?
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?
Alex Insurance Company historically shows that 10% of their insured received at least one traffic ticket last year. This year, considering no changes, a sample of 200 drivers was chosen. What is the probability that less than 34 policyholders will receive at least one traffic ticket this year?
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.
Suppose that it is known that 45% of eighteen-year-olds in a particular city do not have a driver's licence. If a random sample of 20 eighteen-year-olds is taken in the city, what is the probability that more than half of them will not have a driver's licence?
Based on data from AMSC Online Instruction project, 77% of adult learners use social network sites. If two adult learners are randomly selected, what is the probability that they use social network
A survey showed that 71% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 8 adults are randomly selected, find the probability that at least 7 of them need correction for their eyesight. Is 7 a significantly high number of adults requiring eyesight correction?

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