✓ 1✓ 2Part: 0/2Part 1 of 2A sample ofSkip Part34Check= 5How's the economy? A pollster wants to construct an 80% confidence interval for the proportion of adults who believe that economic conditions are gettingbetter.X67(a) A poll taken in July 2010 estimates this proportion to be 0.28. Using this estimate, what sample size is needed so that the confidence interval will havea margin of error of 0.05?8Radults is needed to obtain an 80% confidence interval with a margin of error of 0.05.9MacBook Air10HXSSave For LaterEspañol88.Submit Assignment© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility

The sample proportion, i.e., the proportion obtained from the survey, .The desired margin of error…

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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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The first day of baseball comes in late March, ending in October with the World Series. Does fan support grow as the season goes on? Two polls, one conducted in March and one in November, both involved random samples of 1,000 adults aged 18 and older. In the March sample, 49% of the adults claimed to be fans of professional baseball, while 57% of the adults in the November sample claimed to be fans. USE SALT (a) Construct a 99% confidence interval for the difference in the proportion of adults who claim to be fans in March versus November. (Let p₁ be the proportion of people who claim to be baseball fans in March and p₂ be the proportion of people who claim to be baseball fans in November. Use p₁ - P₂. Round your answers to three decimal places.) to
Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone. Part: 0 / 3 Part 1 of 3 (a) A survey by the National Consumers League estimated the nationwide proportion to be 0.38. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.04? A sample of children aged 8-10 living in New York is needed to obtain a 95% confidence interval with a margin of error of 0.04 using the estimate 0.38 for p. Skip Part. Check E 888 R $100 FO MacBook Air X Save For Later C 00 [110] Submit Assignment 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilit
How's the economy? A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. a. A Gallup poll estimates this proportion to be 0.34. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? b. Estimate the sample size needed if no estimate of "p" is available.
Part 1 and 2
Part 2
Estimate the sample size needed if no estimate of p is available. PART B
How do I solve Part A?
Call me: A sociologist wants to construct a 99% confidence interval for the proportion of children aged 8 - 10 living in New York who own a smartphone.(a) A survey by the National Consumers League estimated the nationwide proportion to be 0.40 . Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02 ?
00 00 0 Chalkduster 07+lab+110 15 lılı @27% Part 2. Estimating Population Parameters 3. In a Harris poll of 2036 adults, 40% said that they prefer to get their news online. Construct a 95% confidence interval estimate of the percentage of adults who say that they prefer to get their news online. Can we safely say that fewer than 50% of adults prefer to get their news online? 4. The LA times printed the headline "Most California Voters Support Legalizing Recreational Marijuana." That headline was based on a survey of 1879 Californians, with 1090 of them supporting Proposition 64 (which passed during the November 2016 election and opened up the state for legal cannabis sales starting in 2018). Use the survey results to construct a 95% confidence interval estimate for the percentage of Californians who support legalization of recreational marijuana. Is the claim in the headline supported by the poll findings? X
Early-childhood-development studies indicate that the more often a child is read to from birth, the earlier the child begins to read. A local parents’ group wants to test this theory and samples families with young children. They find the following results. Construct a 99% confidence interval to estimate the true difference between the proportions of children who read at an early age when they are read to frequently compared to those who were read to less often, as described in the table of results. Let Population 1 be the children who were read to frequently and Population 2 be the children who were read to less often. Round the endpoints of the interval to three decimal places, if necessary. Ages when Children Begin to Read Read to at Least Three Times per Week Read to Fewer than Three Times per Week Started Reading by age 4 60 35 Started Reading after age 4 36 51 Lower end point: Upper end point:
Surgical complications: A medical researcher wants to construct a 99.8% confidence interval for the proportion of knee replacement surgeries that result in complications. Part: 0 / 2 Part 1 of 2 (a) An article in a medical journal suggested that approximately 15% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? A sample of operations is needed to obtain a 99.8% confidence interval with a margin of error of 0.03 using the estimate 0.15 for p.

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