Sleep apnea: Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition mustwake up frequently to breathe. In a sample of 430 people aged 65 and over, 110 of them had sleep apnea.Part: 0 / 3Part 1 of 3(a) Find a point estimate for the population proportion of those aged 65 and over who have sleep apnea. Round theanswer to at least three decimal places.The point estimate for the proportion of those aged 65 and over who have sleep apnea is×Ś

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A claim is made that the proportion of children who play sports is 0.563, and the sample statistics include 1,244 subjects with 31% saying that they play a sport. Find the z value. (Round final answer to four decimal places)
Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 535 randomly selected adults showed that 55% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
Smart phone: Among 245 cell phone owners aged 18-24 surveyed, 106 said their phone was an Android phone. Part: 0/ 3 Part 1 of 3 (a) Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone. Round to at least three decimal places. The point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone is Save For Later Skip Part Check Answer O2022 McGraw Hill LLC. All Rights Reserved. Terms of L o耳一 M G. ere to search
How often do we trust a brand recommended online? Let p represent the proportion of the time a consumer trusts a brand that showed up on their social media feed. USE SALT (a) If you have no preliminary estimate for p, how many participants should you include in a random sample to be 80% sure that the point estimate will be within a distance of 0.09 from p? (Round your answer up to the nearest whole number.) X participants (b) Suppose that a report stated that 73% of consumers trust a brand recommended on their social media feed. Using this estimate for p, how many participants should you include in a random sample to be 80% sure that the point estimate will be within a distance of 0.09 from p? (Round your answer up to the nearest whole number.) Xparticipants Need Help? Read It Submit Answer
Internet service: An Internet service provider sampled 538 customers and found that 78 of them experienced an interruption in high-speed service during the previous month. Part: 0/3 Part 1 of 3 (a) Find a point estimate for the population of all customers who experienced an interruption. Round the answer to at least three decimal places. The point estimate for the population proportion of all customers who experienced an interruption is X 5 6 dla
Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 595 randomly selected adults showed that 62% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 446 randomly selected adults showed that 61% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
Pew Research surveyed a random sample of 1,313 U.S. adults in 2011. They asked them: "How important is it, to you personally, to be successful in a high-paying career or profession?" Importance Very important Somewhat important Not important Total Chi-square test Statistic Chi-square total female male 403 408 811 (66.1%) (58.0%)| (61.8%) 158 218 376 (25.9%) (31.0%) (28.6%) 49 77 126 (8.0%) (11.0%) (9.6%) 610 703 1313 (100%) (100%) (100%) df Value P-value 2 9.287 0.0096 We want to test if men and women have the same ideas about the importance of this kind of success. What are the hypotheses?
Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 619 randomly selected adults showed that 56% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
A foundation conducted a survey of physicians' attitude about health care reform, calling the report "a survey of 100,000 physicians." The survey was sent to 100,000 randomly selected physicians practicing in the United States: 38,000 via post-office mail and 62,000 via email. A total of 2,474 completed surveys were received. What is the rate of nonresponse for this survey? (Round your answer to two decimal places.)
alo Smart phone: Among 248 cell phone owners aged 18-24 surveyed, 104 said their phone was an Android phone. Part: 0 / 3 Part 1 of 3 (a) Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone. Round the answer to at least three decimal places. The point estimate for the proportion of cell phone owners aged 18-24 who have an Android phone is Part: 1/3 Part 2 of 3 (b) Construct a 99.5% confidence interval for the proportion of cell phone owners aged 18-24 who have an Android phone. Round the answers to at least three decimal places. A 99.5% confidence interval for the proportion of cell phone owners aged 18-24 who have an Android phone is
Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 419 randomly selected adults showed that 62% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)

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