7. Suppose we wanted to take a new sample of Greeks today, ask them the same question, and calculate a 95% confidence interval for the proportionof Greeks today who say they are "suffering" with a margin of error of no more than 5%. What size sample should we take?Important! Use the information from the 2011 sample for a planning value for p* and round your z* value to EXACTLY 3 decimal places. Your answershould be given as an integer.n = Life rating in Greece - Greece faced a severe economic crisis since the end of 2009. Suppose a Gallup poll surveyed 1010 randomly sampled Greeksin 2011 and found that 273 of them said they would rate their lives poorly enough to be considered "suffering." Round all answers to four decimalplaces.1. What is the population parameter of interest?A. The 273 Greeks in the sample who believed they were suffering.B. The actual proportion of Greeks who said they were suffering in 2011.C. All the people who lived in Greece in 2011.D. The score on the survey that corresponds to suffering.2. What is the value of the point estimate of this parameter?3. Use the sample information from 2011 to construct a 95% confidence interval for the proportion of Greeks in 2011 who said they were "suffering."

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Answered: 7. Suppose we wanted to take a new…

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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Now, let's imagine the poll that found that 52% of U.S. adults believe that the federal government has too much power. And let's say the poll was conducted via telephone interviews among 1010 U.S. adults and contained a margin of error of 2 percentage points at the 95% confidence level. Question 5 Use the information above to create an interval estimate for the proportion of all U.S. adults who believe that the federal government has too much power. %, I don't know %) You answered 4 out of 4 correctly. Asking up to 5. Last attempt
Suppose you take a sample of size 46 from a Normal distribution with unknown population mean and a population standard deviation of 11. You find your sample has mean 406 and intend to use this as an estimate in a confidence interval. If you wish to construct a 95% confidence interval, what margin of error should you use? Give your answer to two decimal places
We would like to compute a 98% confidence interval on the proportion of CBC students that will be transferring to a 4 year college or university after their time at CBC. The current proportion is unknown and we would like an error of no more than 1.5% in the estimate. How large of a sample needs to be taken?
You recently sent out a survey to determine if the percentage of adults who use social media has changed from 60%, which was the percentage of adults who used social media five years ago. Of the 2307 people who responded to survey, 1721 stated that they currently use social media. a) Use the data from this survey to construct a 96% confidence interval estimate of the proportion of adults who use social media. Round your final answer to two decimal places. < p < b) Can you conclude that the percentage of adults who use social media has changed? Explain. Yes, because the proportion of adults who used social media five years ago is inside of the confidence interval. Yes, because the proportion of adults who used social media five years ago is not inside the confidence interval. No, because the proportion of adults who used social media five years ago is inside the confidence interval. No, because the proportion of adults who used social media five years ago is not inside the confidence…
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19.
Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a sample proportion of p̂=0.23. What is the margin of error?
If n=330 and p (p-hat) -0.27, find the margin of error at a 90% confidence level Give your answer to three decimals
8. In late 2020, a poll was conducted to determine the proportion of American adults that subscribed to a TV or movie streaming service since January 2020. The surveyors randomly selected 2200 American adults. The results are shown in the relative frequency table below. Response Frequency Subscribed to at least one 794 Did not subscribe to a new one 1406 Given this information, we want to create a 95% confidence interval to estimate the proportion of American adults that subscribed to a TV or movie streaming service since January 2020. a. What is the value of the point estimate for our 95% confidence interval? b. What is the margin of error for our 95% confidence interval? (Use the formula to compute it). Round your answer to three decimal places. C. Using your answers to parts (a) and (b), find a 95% confidence interval estimating the proportion of American adults that subscribed to a TV or movie streaming service since January 2020.
9. According to a poll, eighty seven percent (87%) of California adults (440 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a ninety percent (90%) confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?
In a random sample of 91 college students, the average number of Discord messages handled in one day is 216. The 95% confidence interval for the mean number of messages handled by students daily is given as 210 to 222. a. What is the population standard deviation? b. If the number of samples were doubled, what would be the new confidence interval (keeping the same confidence level?) Please include any equations used so I can fully learn this.
10. We had two experimental conditions, each with 10 participants Set up a 99% confidence interval for the difference using the data below. Report your final answer for each question using proper APA notation. Write a sentence indicating what your answer means. X = 12.2 SS = 54.8 X = 13.8 SS, = 72,5

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