A survey showed that 8% of Internet users age 18 and older report keeping a blog....
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 an Internet user is a young adult? c. What is the probability that an Internet user keeps a blog and is a young adult? d. Suppose that in a follow-up phone survey we contact someone who is 24 years old. What is the probability that this person keeps a blog?
Homework Answers
Given that 8% of Internet users age 18 and older report keeping a blog.
a) A joint probability table for these data with two rows (bloggers vs. non-bloggers) and two columns (young adults vs. older adults)
| Young adults | Older adults | |
| Bloggers |  |
 |
| Non-bloggers |  |
 |
b) The probability ,
c) The probability ,
d) The probability ,
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A survey showed that 8% of Internet users age 18 and older
report keeping a blog....
6.24 In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of...
6.24 In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet regularly. Of the Internet users, 1054 use a social networking site. Find and interpret a 95% confidence interval for each of the following proportions: a) Proportion of US adults who use the internet regularly. b) Proportion of US adult Internet users who use a social networking site. c) Proportion of all US adults who use a social networking site. Use...
Q7 The percentage of adult users of the Internet who use social media has increased over...
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...
Suppose a survey of 600 young adults age 18 to 24 showed that 162 had used...
Suppose a survey of 600 young adults age 18 to 24 showed that 162 had used online dating. Calculate and interpret a confidence interval estimate for the true proportion of all young adults age 18 to 24 who ever used online dating. Use a 95% confidence level.
According to a consumer survey of young adults (18-24 years of age) who shop online, 30%...
According to a consumer survey of young adults (18-24 years of age) who shop online, 30% own a mobile phone with internet access. In a random sample of 400 young adults who shoponline, let x be the number who own a mobile phone with internet access. a. Explain why x is a binomial random variable (to a reasonable degree of approximation). Choose the correct explanation below. A. The experiment consists of n identical, dependent trials, where there are only two...
According to a consumer survey of young adults (18-24 years of age) who shop online, 29%...
According to a consumer survey of young adults (18-24 years of age) who shop online, 29% own a mobile phone with internet access. In a random sample of 400 young adults who shop online, let x be the number who own a mobile phone with internet access. a. Explain why x is a binomial random variable (to a reasonable degree of approximation). Choose the correct explanation below. A. The experiment consists of n identical, dependent trials, with more than two...
YouTube is a popular destination on the internet; let's look at how YouTube usage is distributed...
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...
One of the questions on a survey asked adults if they used the internet at least occasionally. The results showed that 453 out of 478 adults aged 18–29 answered Yes; 738 out of 833 adults aged 30–49an...
One of the questions on a survey asked adults if they used the internet at least occasionally. The results showed that 453 out of 478 adults aged 18–29 answered Yes; 738 out of 833 adults aged 30–49answered Yes; 1,059 out of 1,644 adults aged 50 and over answered Yes. (Round your answers to four decimal places.) (a) Develop a point estimate of the proportion of adults aged 18–29 who use the internet. (b) Develop a point estimate of the proportion...
kindly assist with questions 8,10, 12, 14 and questions 18 and 26 thank you 8) noted...
kindly assist with questions 8,10, 12, 14
and questions 18 and 26
thank you
8) noted thatc Mars, Inc., the c 8 Checolate An article in Aunat of Nutrition (Vol. 130 No. K nacwsds. The article noees egular consumption of foosds rich in h rist of ovonars hoart drsease" The stuty received Funding from M and the Chovolate Manufacturers Association Sampling Methed. In Kxwrvises 9-12, determine whether the sa 17. Gontsxt of the t ngfal way in which e 8...
Using the book, write another paragraph or two: write 170 words: Q: Compare the assumptions of...
Using the book, write another paragraph or two: write 170
words:
Q: Compare the assumptions of physician-centered and
collaborative communication. How is the caregiver’s role different
in each model? How is the patient’s role different?
Answer: Physical-centered communication involves the specialists
taking control of the conversation. They decide on the topics of
discussion and when to end the process. The patient responds to the
issues raised by the caregiver and acts accordingly. On the other
hand, Collaborative communication involves a...
6.24 In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet regularly. Of the Internet users, 1054 use a social networking site. Find and interpret a 95% confidence interval for each of the following proportions: a) Proportion of US adults who use the internet regularly. b) Proportion of US adult Internet users who use a social networking site. c) Proportion of all US adults who use a social networking site. Use...
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...
kindly assist with questions 8,10, 12, 14
and questions 18 and 26
thank you
8) noted thatc Mars, Inc., the c 8 Checolate An article in Aunat of Nutrition (Vol. 130 No. K nacwsds. The article noees egular consumption of foosds rich in h rist of ovonars hoart drsease" The stuty received Funding from M and the Chovolate Manufacturers Association Sampling Methed. In Kxwrvises 9-12, determine whether the sa 17. Gontsxt of the t ngfal way in which e 8...
Using the book, write another paragraph or two: write 170
words:
Q: Compare the assumptions of physician-centered and
collaborative communication. How is the caregiver’s role different
in each model? How is the patient’s role different?
Answer: Physical-centered communication involves the specialists
taking control of the conversation. They decide on the topics of
discussion and when to end the process. The patient responds to the
issues raised by the caregiver and acts accordingly. On the other
hand, Collaborative communication involves a...
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