Social Networking Sites 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.7 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 the confidence interval to estimate whether it is plausible that 50% of all US adults use a social networking site.

Of 260 employees selected randomly from one company, 18.46% of them commute by carpooling. Construct a 98% confidence interval for the true percentage of all employees of the company who carpool. Interpret the results.

Assume a nationwide random survey of 800 adults asked about attitudes toward “alternative medicine” such as acupuncture, massage therapy, and herbal therapy. Among the respondents, 448 said they would use alternative medicine if traditional medicine was not producing the results they wanted. Give a 99% confidence interval for the proportion of all adults who would use alternative medicine.

4. A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99% confidence interval of the population proportion.

Of 848 children surveyed, 144 plan to join a volunteer group in the future. Construct a 90% confidence interval for p.

b. In the year 2000, a survey of 1171 U.S. adults were asked who they felt was the greatest President. Of those surveyed, 397 reported that Abraham Lincoln was the greatest President. Use this data to construct a 99% confidence interval for the population proportion of all U.S. adults who would say that Abraham Lincoln was the greatest president before the year 2000. Answer using decimals and round to four decimal places

In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for the population proportion of adults who believe in UFOs

A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a 95% confidence interval for the proportion of adults who have a Facebook page.

In a survey of 32 students at a local high school, 17 support changing the schools mascot. Find the 90% confidence interval for the true population proportion of students who support changing the schools mascot.

In a recent survey of 1003 students, 977 of them would like to recommend www.helpyourmath.com to their friends. Construct a 90% confidence interval to estimate the proportion of all students who would recommend www.helpyourmath.com to their friends. Give your answers to three decimals: Submit Question