In 2016, the Pew Research Center reported the results of a survey about public library usage. A nationally representativ sample of 1601 people aged 16 and older who were living in the United States completed the survey. One survey question asked whether the survey respondent had visited, in person, a library or a bookmobile in the last year. A total of 768 of those surveyed answered "yes" to this question. Although the samples in national polls are not simple random samples, the are similar enough that our method gives approximately correct confidence intervals. Give a 99% confidence interval for the proportion of all American adults who answered yes on the survey question. (Use the table of critical values of the Normal distributions. Give your answer as an interval in the form (lower limit, upper limit). Use decimal notation. Give the limits to two decimal places.) 99% confidence interval:

In 2016, the Pew Research Center reported the results of a survey about public library usage. A nationally representativ sample of 1601 people aged 16 and older who were living in the United States completed the survey. One survey question asked whether the survey respondent had visited, in person, a library or a bookmobile in the last year. A total of 768 of those surveyed answered "yes" to this question. Although the samples in national polls are not simple random samples, the are similar enough that our method gives approximately correct confidence intervals. Give a 99% confidence interval for the proportion of all American adults who answered yes on the survey question. (Use the table of critical values of the Normal distributions. Give your answer as an interval in the form (lower limit, upper limit). Use decimal notation. Give the limits to two decimal places.) 99% confidence interval:

Name: In 2016, the Pew Research Center reported the results of a survey abo
Uploaded: 2024-03-20T07:06:27.000Z
Channel: Bartleby
Description: In 2016, the Pew Research Center reported the results of a survey about public library usage. A nationally representativesample of 1601 people aged 16 and older who were living in the United States completed the survey. One survey questionasked whet

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

please answer a, b, c, and d
Matrimo.., ..onthly is a top-selling magazine that provides information for couples thinking about marriage. Over the years, writers for the magazine have researched just about everything there is to research about weddings. The popular conception at the magazine has been that roughly 50% of first weddings take place indoors in a church, 30% take place indoors in a building other than a church, and 20% take place outdoors. This past week, the magazine examined a random sample of 280 first weddings and found the distribution given by the first row of numbers in the table below. (This row contains the frequencies observed in their sample of 280.) The second row of numbers gives the frequencies expected under the hypothesis that the popular conception at the magazine is correct. The bottom row of numbers contains the following value for each of the wedding location categories. 2 (Observed frequency – Expected frequency) Expected frequency Part 1 (fo-fE) Fill in the missing values in the…
A physician wants to develop criteria for determining whether a patient's pulse rate is atypical, and she wants to determine whether there are significant differences between males and females. Use the sample pulse rates below. Male 9696 6060 6868 6868 6868 8888 6868 5656 6464 8888 Female 6060 6060 6464 6060 8484 6464 7272 104104 104104 124124 a. Construct a 9595% confidence interval estimate of the mean pulse rate for males.
Cyberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens were asked if they had ever experienced any of the below 6 types of cyberbullying while online or via their cellphone. Those who selected yes to one or more of these questions were considered to be a target of cyberbullying. (Source: Pew Research Center, September 2018, "A Majority of Teens Have Experienced Some Form of Cyberbullying") Offensive name-calling Spreading of false rumors Receiving explicit images they didn't ask for Constant asking of where they are, what they're doing, who they're with, by someone other than a parent Physical threats Having explicit images of them shared without their consent a.) A total of 438 of the sampled teens were considered a target of cyberbullying. Find a 92% confidence level for the proportion of all teens in the U.S. who are a target of cyberbullying. (Round answers to three decimal places.)margin of error: lower limit: upper limit:
Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation. What are the degrees of freedom?
Kim Kardashian is interested in studying the phenomenon of selfies more deeply. She randomly selects 20 of her Instagram followers' feeds. For each selected feed, she records the number of selfies posted in the past year and the number of people in the foreground of the picture. What is the sample of this study?
River Run campground has sites for people to use for camping. The sites can be reserved for a certain number of days. To help with cleaning and maintenance, the campground requests an exit time (the time at which campers leave the site) of 9 A.M. on the last day of the reservation. To estimate the typical exit time, the manager of River Run selected a random sample of 60 sites. Of the selected sites, 40 were reserved by people without young children, and 20 were reserved by people with young children. The following histograms summarize the exit times, recorded as minutes relative to 9 A.M. For example, an exit time of 9:30 A.M. is 30 minutes relative to an exit time of 9 A.M. Each interval contains possible values from the left endpoint up to but not including the right endpoint. Compare the two histograms. How many of the 60 sites had an exit time before 8:30 A.M.? How many of the 60 sites had an exit time of 11:00 A.M. or later? Compare the distributions of the exit times for…
The Book Industry Study Group, Inc., performs sample surveys to obtain information on characteristics of book readers. A book reader is defined to be one who read one or more books in the six months prior to the survey; a non-book reader is defined to be one who read newspapers or magazines but no books in the six months prior to the survey; a nonreader is defined as one who did not read a book, newspaper, or magazine in the six months prior to the survey. The following data were obtained from a random sample of people 16 years and over. Household Income Less than $15,000 1₁ $15,000 to $24,999 12 $25,000 to $39,999 13 $40,000 and over 14 Total Select one: O a. 0.571 O b. 0.497 O c. 0.685 Classification Book Non-book Non- Total reader reader reader C₁ C₂ C3 173 267 O d. 0.114 151 163 222 709 166 142 90 665 55 495 17 9 3 334 314 315 Suppose one of these persons is selected at random, compute P(C₂ or 1₂). 84 1458
Help please!
A physician wants to develop criteria for determining whether a patient's pulse rate is atypical, and she wants to determine whether there are significant differences between males and females. Use the sample pulse rates below. Male 9696 6464 8888 8888 7676 6464 6464 7272 6868 6464 Female 104104 7272 6060 6464 7676 104104 7676 9696 8888 124124
In 2010, the Physicians Foundation conducted a survey of physicians' attitudes about health care reform, saying that the report was "a survey of 100,000 physicians." The survey was sent to 100,000 randomly selected physicians practicing in the United States: 40,000 via post-office mail and 60,000 via email. Assume that a total of 2311 completed surveys were received. O Macmillan Learning What population is sampled in this survey? The population is 100,000 randomly selected physicians practicing in the United States. The population is all physicians. O The population is 2311 physicians that completed surveys. O The population is all physicians practicing in the United States. What is the sample size for this survey? Give your answer as a whole number. n = Could you draw conclusions from this study about all
Which of the following are sources of sampling error and which are sources of nonsampling error? Sampling error Nonsampling error Answer Bank The subject lies about past illegal drug use. The subject cannot be contacted in five calls. The telephone directory is used as a sampling frame. Interviewers choose people on the street to interview. Data are gathered by asking people to go to a website and answer questions online. A typing error is made in recording the data.