YouTube is a popular destination on the internet; let's look at
how YouTube usage is distributed among age groups. According to the
Pew Internet and American Life Project, about 70% of internet users
aged 18-29 have visited YouTube, along with 51% of those aged 30-49
and 26% of those 50 or older. About 30% of adult internet users are
18-29 years old, another 45% are 30-49, and the remaining 25% are
50 and over.
(a) Calculate the probability that a randomly selected internet
user has used YouTube.
(b) If we randomly select a YouTube internet user, what is the
probability they are aged 18-29?
YouTube is a popular destination on the internet; let's look at how YouTube usage is distributed...
Q7 The percentage of adult users of the Internet who use social media has increased over time. Of adult Internet users age 18–49, The percentage of adult users of the Internet who use social media has increased over time. Of adult Internet users age 18-49, 81% use social media. Of adult Internet users age 50 and older, 53% use social media. Assume that 52% of adult Internet users are age 18-49. (a) What is the probability that a randomly selected...
Online chat rooms are dominated by the young. Teens are the biggest users. If we look only at adult internet users (aged 18 and over) 47% of the 18 to 29 age group chat, as do 21% of the 30 to 49 age group and just 7% of those 50 and over. The distribution of age break down for these internet users is: 30% of the adult internet users are 18 to 29, another 50% are 30 to 49 and...
A survey showed that 8% of Internet users age 18 and older report keeping a blog. Referring to the 18–29 age group as young adults, the survey showed that for bloggers 54% are young adults and for nonbloggers 24% are young adults (Pew Internet & American Life Project, July 19, 2006). a. Develop a joint probability table for these data with two rows (bloggers vs. non-bloggers) and two columns (young adults vs. older adults). b. What is the probability that...
One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet at least occasionally (Pew website, October 23, 2012). The results showed that 454 out of 478 adults aged 18-29 answered Yes; 741 out of 833 adults aged 30 - 49 answered Yes, 1058 out of 1644 adults aged 50 and over answered Yes. User-table Round your answers to four decimal places. 3. Develop a point estimate of the proportion of adults...
27. A marketing firm would like to test-market the name of a new energy drink targeted at 18-to 29-year-olds via social media. A study by the Pew Research Center found that 35% of U.S. adults (18 and older) do not use social media (Pew Research Center website, October 2015). The percentage of U.S. young adults age 30 and older is 78%. Suppose that the per centage of the U.S. adult population that is either age 18-29 or uses social media...
es Esercise 07.13 Check My Work eBook used the Internet, at least occasionally (Pew website, October 23, 2012). The results questions in the Pew Internet & American Life Project esked adults if they OOne of the o showed that 434 out of 478 adults aged 18-29 answered Yes; 741 out of 833 adults aged 30-49 answered Yes; 1058 out of 1644 adults aged 50 and over answered Yes. Round your answers to four decimal places. a. Develop a point estimate...
In February, the Pew Internet & American life project conducted a survey that included several questions about how Internet users feel about search engines and other websites collecting information about them and using this information either to shape search results or target advertising to them. In one question, participants were asked, "If a search engine kept track of what you search for, and then used that information to personalize your future search results, how would you feel about that?" Respondents...
Allegiant Airlines charges a mean base fare of $88. In addition, the airline charges for making a reservation on its website, checking bags, and inflight beverages. These additional charges average $38 per passenger. Suppose a random sample of 60 passengers is taken to determine the total cost of their flight on Allegiant Airlines. The population standard deviation of total flight cost is known to be $40. Use z-table. a. What is the population mean cost per flight? $ b. What...
How common are financial cost or contractual constraints associated with smartphone ownership? A survey of smartphone users found that 50% of the 18- to 29-year-olds, 40% of the 30- to 49-year-olds, 26% of the 50- to 64-year-olds, and 17% of those age 65 or older have reached the maximum amount of data they are allowed to use as part of their plan, at least on occasion: Suppose the survey was based on 300 smartphone owners in each of the four...
One of the questions in the Pew Internet& American Life Project asked adults if they used the Internet at least occasionally (Pew website, October 23, 2012). The results showed that 454 out of 478 adults aged 18·29 answered Yes; 741 out of 833 adults aged 30-49 answered Yes; 1058 out of 1644 bduts aged so and over answered Yes. Use etable. Round your answers to four decimal places a. Develop a point estimate of the proportion of adults aged 18-29...